I Have Gained 30 Lbs, I Sweat Terribly For No

I have gained 30 lbs, I sweat terribly for no reason and did not normally sweat at all, I'm usually able to put in a good 14 hours a day, but now I can barely handle 3-4 without resting, I choke often, seem to always have a horse throat, very dry skin, and breathing difficulty. I had a heart cath no problems, no high blood pressure, I passed the breathing test, and now I just feel lost that no one seems to know what's wrong. Help