I shoveled snow throughout the third trimester of my first pregnancy, chopped ice off the length of my driveway the day before my due date so I knew my husband wouldn't slide down the hill when we were headed to the birthing center. 15 weeks now with baby #2 and been shoveling for weeks. Yeah, if you were healthy enough to do it before you're healthy enough to do it now.
A lot of people think pregnancy is a disability and means they can't do anything anymore. It's not. Keep active unless your doctor or midwife tells you otherwise. It's good for your body and it's good for your baby.