Worried about work

Heather
Jus got my bfp today, but I'm a little concerned about going to work tomorro, my job consists of a lot of heavy lifting the cases are well over 20lbs.. I've heard if your body is used to it I should be ok.. But I've also read I should avoid any kind of lifting during first trimester?? I'll ask dr when I see him after tomorro.. I jus want some input from all you wonderful ladies..