Lisa, you asked about my exercise routine. In my last pregnancy I did much more as I'm also a gym bunny and found it very hard to give it up. This time, though, it's been somehow easier to take it really easy. I've found that a good preg exercise rhythm for me is to exercise 3 (or 4 tops) times a week. If I only go three times, I do the following: two of the times I do light, low-impact cardio (walking/stationary bike) for only 30 mins and then I finish up with light muscle exercises. Prior to pregnancy I would always go through my whole program but now I divide it into two and only do half at a time and cut those down to a bare minimum too (about 4 different types of exercises - only short, single sets). So that's another 10-30 mins of light muscle toning/stretching. Furthermore, I've brought all the weights to minimum - big muscle groups (lunges, squats etc) I actually do using my own weight only. So, keeping it extra light but still challenging my body a
little bit, as that helps me feel better with the tiredness and nausea. Then my third time is just cardio - about a 30 min brisk walk during which I carry
tiny weights to flex my upper body every couple of minutes. That makes the walk a little bit more demanding but naturally I keep my HR under 140 at all times.
Whoops, that was a long explanation

But I guess it describes quite well how I, too, have really agonized over this and am striving to do the right thing for both my body and the baby. This seems so little and so light in comparison to "normal" exercise", but I've found it works quite well for me as long as I can find a good non-nauseous moment to go

Swimming is a great way to go; personally I just get so bored doing that. Maybe when the spring comes in earnest I'll start swimming samll laps in our courtyard pool for light cardio. I'd also like to try prenatal yoga later but otherwise I'm steering clear of instructed exercise sessions - it just kills me that I can't do all the jumping etc
Good luck with finding the right balance for you!!