Moving while pregnant

I'm 7 weeks pregnant and moving in two weeks. We put in an offer and planned the move before I found out I was pregnant. We're renting a Uhaul to move the boxes ourselves and the heavy furniture is being moved professionally. We live in a condo right now and there's two long flights of stairs to the ground level (no elevator). I have my first appointment with my OB next week so of course I'll ask him, but what do you ladies think about carrying boxes up and down stairs? Nothing really heavy, but it'll be a lot of physical work. I'm fit and work out regularly but I dont want to risk anything, and if I need to book movers to help then I should do it now or there won't be any available. Thanks for your input!