Yellow/ green diarrea?

I know this is really embarrasing, but I just don't feel good at all. the past 4-5 days, I have had an upset stomache, lots of diarrea, lots of pressure in my insides, and terrible smelling gas. I also threw up once 2 days ago around 12am. I think I'm getting better. I have increased strength, but I am still having a lot of pressure in my body and diarrea at least once or twice every two hours. It's very watery, and is sometimes green/yellow, and has the worst smell I've ever smelled. It's like a very sour rotten smell. I was going to schedule an appointment to the doctor, but I want to know if this is just something that will p by or something I should worry about. I've been taking Pepto Bismol and a lot of Vitamin C, and it seems to be helping juat a bit.