I signed up for a prenatal yoga class. (I'll go every Tuesday night for 10 weeks)
My first one was last night. It was great! 10 women, all about my age. Some were due in September, some this Summer and a couple were due this Spring! Prenatal yoga is a little different than regular yoga... no laying on your tummy or back... mostly seated positions and standing upright positions. It was so nice to stretch and focus on breathing. I think this will be very helpful for me.
As an added bonus, studies have shown that women who stay active through pregnancy usually have approx. one hour shorter labors!