I don't recall cramping with DD and haven't been cramping with this baby. Of course, I'm just walking, so maybe not as strenuous. And I drink a ton of water while I exercise and usually have to walk cross legged to the bathroom afterwards.
So I'd definitely make sure you're well hydrated and just try to listen to your body.
I do get some BH during my walk, but they're the normal, mild kind that just remind me that I need to pee as they press on my bladder.
SAHM to Magnolia May (09/10), Luke Russett (04/13) and expecting 11/16. Wife and best friend to my airman.