I'm 23 weeks pregnanct and have been taking part in a sponsored swim over the past few weeks, aiming to total 34 km (1360 lengths) over 10 weeks. This should have been 3 swims a week, of between 40 and 50 lengths a time. (Prior to pregnancy I was swimming 2 or 3 times a week at 40-60 lengths a time so didn't think this was outrageous) Fool that I was, I didn't account for being ill (just a bad cold) mid-way through and falling behind on the lengths. Since getting better I've upped my swimming a bit to try to catch up as it's all meant ot be completed by March 25th. I've nearly done it, even though I admit the swimming is getting harder as I get bigger. But people are concerned that I've overdone it, and now that concern is rubbing off on me. I have put in some long swims, I admit - on Sunday I did 90 lengths. BUT I had bags of energy when I started and did it at a relaxed pace, taking breaks avery 20 lengths or so and honestly didn't feel tired until length 86 when my legs felt tired. I've been working on the principle that if I listen to my body and rest when I get tired (I had a very relaxed day after the long swim) I can't go far wrong. But everyone's concern is getting to me. I've agreed to take it a bit easier now even though there's just 1 week of official swimming to go and if necessary take a few days longer to finish the charity swim, but am worried that it's too late and I may have been doing the baby some harm. Sorry for long post, but any advice?