Pregnancy and swimming

I am pregnant in my first week!!!...but got questions as I am a keen masters swimmer and now have to go it alone for 9 months, as clubs make me naturally competitive and anti-natal classes for now are a wee bit slower than what I'd really wish to go - here my questions: 1. I can't find any info on the internet on whether or not doing a flip turn whilst being in the early stages of pregnancy would pose a risk to the fetus? How long into pregnancy did you go if you were continuing doing flips - just out of interest!?... 2. Also, does holding your breath on the flip (like going anaerobic for that short period) - is this a risk too? I've just improved massively on my turns with being able to hold my breath longer for the turn...so a bit of a shame if I have to go back to 'opens', - but not if it poses a risk to my baby! 3. I know that pregnant women should take it easy and NOT get 'out of breath'. I want to continue my swimming up to 3km or so gently in freestyle to maintain my fitness level. Obviously keeping well hydrated is number one, but I always have a big bottle of water/energy drink with me at all swims no matter what and hydrate before and after any workout. 4. I read that swimming pool environments, i.e: chlorine etc. could be a negative risk to the developing fetus and could cause miscarriage. Have any of you thought the same, what is your view on this - did it put you off? I think keeping swimming is better than NOT - hec everything around us poses a risk to the growing baby and I would be rather unhappy if I had to give up swimming completely - I love it to bits!! Thanks for your time....