Been taking it for years and have never got sick. I always take it right after breakfast. If I take it without food I get watery d but never n or v. Just take it with a meal and you should be fine. It has helped me immensely, hope it helps you too. I was like you and scared at first but I was feeling so badly I fought the fear and took it and I am very glad I did. I know it's hard, but remember how badly you want to feel better. You won't know if it helps unless you take it. Don't let your fear stop you! You can do it!