Hi, I drink water before sitting down and after that I felt really loud noises twice, so are these normal and does baby get affected by these noises or not?

No issue here. I am guessing you are pregnant. Intestinal noises are normal and as the fetus matures, it undoubtedly in all cases starts to hear sounds conducted into the uterus with no ill effects. If you need to drink, go for it and don't worry about the abdominal noises.