Your sweating and nervousness are obviously related. Also try different kinds of anti perspirants. My gf had the same sweating problem and I turned her on to my brand of deodorant old spice red zone (soft solid) and she loves it. Mess around with brands. Sometimes mens are made stronger cuz we sweat more so maybe try them. As for the veins. They are dialiating too much possibly because u r nervous or really hot. Once again perhaps try being more calm. I dont know your weight but people who are especially skinny have the same problems so if u r, put on a few healthy pounds :)