Hi AOD,
It's interesting to me that you've had social anxiety but only recently developed HH. I was diagnosed with social anxiety and depression about, oh, 17 years ago. Though in hindsight, I believe my psychological problems were a result of the horrible HH, along with an awful case of cystic acne. Back then, I think it was much more common to diagnose someone as having HH BECAUSE of SA, and not vise versa. But since you had SA well before HH, that model doesn't seem to fit you.
I also sweat much less when it's cold. I find that if I keep the inside temperature below 72 that I can keep the sweating at bay pretty well. As long as I'm not doing anything very active or stressed out. For instance, it's 67 in here now and I'm not sweating at all. Though I can tell my forehead WANTS to sweat. What I'm most interested is how you FEEL at temperatures others find " normal " regardless of the sweating. For instance, I was in a store the other day and noticed it was 76 in there. I seemed to be the only one around that felt uncomfortably warm. Generally, I feel uncomfortably warm at temperatures most people find very normal. I've had this since I've had HH, so my whole life. =P