Rootzdawta, I don't think you have to cut all weight until the third trimester. A friend of mine did #200+ back squats when she was 8 months pregnant with her son. She was also a competitive body builder, so I wouldn't necessarily follow her crazy example, but it's really about what your body was able to take before. If you're feeling tightness or uncomfortableness after heavy-ish squats, you might want to take the weight down. If you're just worried about tightening, I'd just add in some hip opener stretches. I had to take down the weight on my overhead lifts because by around #75 I was just feeling too much pressure in my abs. We haven't done weighted squats in a while, so I don't know what mine feel like.
Pennywhistle, a pregnancy burpee is a variation on a normal burpee, which is basically just a squat thrust but you do a pushup at the bottom and a jump up at the top. YouTube has lots of burpee videos. The pregnancy burpee is just a squat to a (usually elevated) pushup. I've been doing squats and then pushups off a weight bench. I can do a lot more of these suckers without getting winded than I could with burpees. Pushups are great abdominal strengtheners too. That sucks about the pelvic pain after running. Maybe some deep stretching? You're right that it's hard to distinguish between normal preggo pains and overworked preggo pains.
LeAnn, great suggestion for the ball. I've been reading all these studies that say that people who sit for a living will all immediately die. Ack! But I feel silly bringing a ball to work. But being preggo gives me an excuse for all sorts of silly behavior. And most of my sitting is actually done at home since I stand when I teach. So I'll try that this week.
We did 100 squats for time at the gym and I had the 100 squats challenge, so I had to do 200 squats today. Yikes. We'll see how my quads feel tomorrow. I made up for it by doing a full two minutes in a yogi squat (which felt great) and another two minutes in frog pose. We are all going to have great legs and butts when this whole thing is over!!!