Its my second baby (first will be 2 next month) and I have been experiencing the same thing as you even the workouts. I do listen to my body now..I will get very dizzy and even more nauseous than I already am. Did you happen to have a c section? I did I wonder if thats why were both experiencing the stomach pain ...
My 1st scan was done this pass Monday. I went to the ER in pain and that's when they gave me an ultra sound to make sure everything's was ok (which it was). The doctor recommended to keep things light and I can still work out but stop immediately if I feel pain at all
I had my first baby in late 2009 and just found out I was pregnant also!! I've been exercising quite hard and often. Lifting weights too, I've cut back now I know. I've had the some cramps too and my ultrasound was fine though. If your body is use to the hard workouts and you've been doing them for a while I wouldn't stress too much or worry. When's your first scan due?