(I'm purely providing information based on my own experiences, and I'm not a doctor, just someone to talk to)
Here's my take on what may be going on, feel free to pm me if you want to talk:
Your HH is likely related to your sympathetic nervous system. Due to both genetic and environmental stimuli, your body "believes" that the proper thing to do is to produce excess sweat. I'm going to take a shot in the dark and guess that you are between the ages of 18-24 (I don't care how old you are, just going off your symptoms). In a weird way, your suicidal thoughts, at least based off of my own experiences, may help provide a way for managing your symptoms. Being suicidal on a daily basis is awful (and although, to me, it is weird that other people aren't constantly dealing with this level of depression), everyone always tells me that this level of depression isn't normal. I wouldn't be surprised if in your past/current you've had to deal with some really difficult/painful situations, that, if you're like me, have added to your current situation. It's very likely that your HH is greatly magnified by the anxiety from dealing with HH which sounds illogical (and that illogic is where psychology comes in, which I would be happy to talk to you about via pm).
LOOK INTO THESE THINGS:
1. If you have HH, always-double check that you ARE NOT sleeping on a plastic lined mattress. It seems like lining the mattress would be a good idea in order to keep the sweat off of it, but (as ridiculous as it may sound) putting a plastic cover on your mattress will increase your sweating ten-fold.
2. If your underarms are a big part of it (my anxiety leads me to overproduce sweat from my armpits)... Panty-liners stuck to the inside of your shirt (I'm a guy, and I believe that is the right term, I'm sure any girl in your life will help you out) this is the ultimate discovery that I've come across (to answer your next question: nobody will be able to tell that they are there) (Also, you don't want them to have any perfumes or anything as it may irritate your skin)
3. (Depending on a variety of factors) "Alpha blockers" or "Beta blockers" may provide some relief.
4. Prescription deodorant
5. Whenever you go anywhere, tell whoever you are talking to that you sweat a lot (I've never once had someone react in a negative fashion). It'll be scary the first couple of times, but when you tell them it will take all of your body's power over your mind away. Instead of the feelings of humiliation and anxiety (especially around the opposite sex) that you might normally feel, you'll be able to focus on living your life, instead of whether or not they can see how much you sweat.
As far as I can tell, it looks like you've got some choices to make (assuming that you want things to change). Firstly, you need to find a way to overcome looking at suicide as an option. For example, I decided to stop looking at suicide as a something I have control over, and instead as an external tormentor. In doing this, I can honestly say that I've come out of some of my darkest moments laughing. Because, no matter how hard it tries to get me to give in or whatever life throws at me, laughing in the face of such a tremendous pain until it realizes it can't break you, well, my friend, I can assure you that, watching Death itself scurry away... is absolutely a sight worth living for.
Secondly, assuming you've both chosen to live, and to continue reading, you need to decide, if you haven't already, how to go about better managing your HH. I've been told too many times by too many people, both by specialists and amateurs, that what I suffer from will never get better, only to find some way to improve far beyond what I "should be capable of". I say this in the hopes that you will never stop trying to live the life that you want to live, and sure you may never be 100% cured, hell, you may never get 1% cured, but at the very very very least, even if it never goes away, you'll know that your HH regrets the day it chose your life to start messing with.
Thirdly, chose to not be like me. I waited until I was at rock bottom, and I was completely broken mentally, emotionally, and physically, before I got help (and at that point I had to be carried, literally). Whether it is through meds, talking to someone, being talked to, etc.
Finally, think, really deeply think about what you'd tell you to do, or advice you'd give a loved one going through what you're going through. I realize that "talking to yourself" is probably the wrong thing to tell someone to do in order to improve their mental state, but I highly recommend it (I write myself letters)
