Moving into a new house

I am 16 weeks pregnant and I am moving into a new house this weekend. Luckily we’ve had all of our stuff packed and in boxes in storage for some time.. I am not sure what is acceptable to lift or to do physically? Am I able to help my husband move the boxes into the truck or into the house? What do y’all think would be acceptable? I am not very physically active except walking sometimes so I don’t know if that changes anything. I feel bad if I were to just sit back and watch everyone else do all the work, but I also don’t want to hurt the baby. The worst part is I live in Texas where the heat index is about 108 degrees so that’s definitely going to be horrible, but I have no choice. Any thoughts?