obviously the root of your problem is your stress, the solution would be to get help - see a councellor
I used to have problems too, I didn't get help until I started getting panick attacks (ouh!, absolutely awful, one attack and I felt sick for weeks!)
but then my councillor really helped me a lot
If you havent seen a councellor...why?
is it becoz you:
-think your problem is very small, and that others may need the help more than you do?
-you think that you ought to be able to solve the problem on your own?
-you had a bad experience with another councellor?
-you're afraid even the councillor won't understand you and think you're crazy
......
those are just some of the wrong reasons to not go get help,
In my experience, the councellor's understanding was shocking, ...like while I may say only a few words(coz my jaws were 'locked' when I was fighting back tears)...he was able to predict the sentences I was trying to say.... also, in areas where I felt ashamed of myself, he helped me to see from a different angle

.
ALSO - after I had help, I was able to live a more productive life - with the stress over, I can concentrate better, work faster, motivate myself, and infact, I wont be studying in Univesity now if I had't had help(I would have failed high scool because of my non-academic stress)
I now even enjoy TV/shopping/socializing...(all these I used find boring, infact, in those days, I may go to the movies with my friends(as they have nagged me to), while they laugh themself silly, I did not ubderstand what was so fun about movies no matter how hard I tried to see the funny side)
stress is more deabilitating the what you may think, go get help from a councellor - they don't bite(serious! - sue the if they do!), It's really worth a try
just another thing...caffeine makes me sweat(and of course, even in cold weather) so I avoid coffee, coke...
the councillor may also refer you to a doctor to treat your sweating problem(your sweating problem is quite serious)