Far from the only one, I'm sure.
My therapists seem to all agree that depression affects everything, as can diet, sleep and physical health problems and vice versa; they could affect how clinically depressed you become.
The key is to try to figure out a 'root cause' and focus on that first-- solve one problem at a time.
Once you are less depressed, you may find yourself being less anxious naturally.
Or perhaps the only reason you are feeling sad is that you are not social-- and being more social will help you to feel more positive, I guess?
Baby steps.
Welcome to the forum