I'd tend to sweat a bit too much, like when i'm in a crowded area, but at home, i don't. i wouldn't say it's hyperhidrosis though. what should i do?

GAD: Discuss possibility of anxiety and related disorders with your doctor, psychiatrist, or psychologist.

Possible thyroid: dysfunction or autonomic dysfunction. Certainly get checked for anemia, blood sugar and thyroid function. I agree that stress, tension, anxiety, insomnia ans unresolved conflict may play a role. Try exercise , yoga and meditation.

Relax: Use talc, anti-perspiration deodorant armpit stick, and try to relax a bit, it's probably because crowds make your nervous. Try to figure out what about crowds makes you so uptight, cognitive therapy with a psychologist can help with that