Hi Alex, I am 8 weeks pregnant, yesterday I went swimming with my 9 year old niece, without even thinking I went in the hydrotherapy pool. I`ve alway known you shouldn`t exercise in the hydro pool. It didn`t even enter my mind at the time! I was in there for about 20 minutes. Thinking back, it wasn`t hot water, I didn`t feel overheated and I wasn`t doing laps or jumping about, I was really just walking up and down, but still I feel very guilty and am worrying about it. What are the chances of my causing damage to my baby and what are some birth defects that can accur from overheating!