New challenges in exercising

I made it my second trimester resolution to try to get more exercise and I've actually been fairly successful at this goal over the past month (this is after four months of barely doing anything at all!).  I've been managing to get out about four times per week - usually a mix of cross-country skiing, swimming, and the gym.  I feel good to be exercising as it gives me a sense (however false it might be) of having some type of control over what's happening to my body.  I also have been enjoying the fresh air and chats with friends.  The above pic was taken last weekend (at 5 1/2 months pregnant) on the Spray Loop in Banff.  I got to go out with my good friend Anthea for a lovely little 12.5km ski.  The temps were great and the snow was in good condition.  The loop is supposed to take about 1 1/2 hrs to complete - it took us (read me) 3 hours.  Carrying a baby around while exercising is apparently hard work (ironically, this actually seems to have come as a surprise to me) and make me really slow.  I also get way more tired and sore after an outing like this - I think that I had to take a 3 hour nap after we got home - but every little bit helps my mood and I am truly just happy to get out.  I'm also grateful to have wonderful friends who are willing to go at my pace and who don't make fun of me for being slow as a turtle.