I seeked out a certified pre & post natal trainer for exercises and they worked really well. I continued hitting the gym with a few alterations to my workout after finding out I was pregnant.
Same here.. due to fatigue and whatnot. Though on days that i have the energy, i follow some zumba videos on youtube.
Me sometimes still hit the gym, do some squats and arm workouts, follow by treadmill.
Regular slow paced swims, and lots of walking
Maybe walking and some yoga
Swimming