Bed rest?

So yesterday I was moving boxes and things out of the closest and one was a little heavier than expected, after I set it down I started feeling a pain underneath my left rib, the pain wasn't too bad until today, now it hurts when I sneeze, laugh, try to bend even a little, I'm pissed because I'm trying to laundry and I can barely do that, laying down even hurt a bit. I'm 32 weeks and I'm going to go to the hospital after my boyfriend gets off work so they can check it out, I can still feel my baby kicking around so I'm sure she's fine but do you think they'll put me on bed rest? Considering I work as a server, all I do is pick up plates all day, I wonder if they'll put me on bed rest or if the pain isn't anything serious and I can keep working? Does anybody know what could have happened? Maybe a ligament got pulled or something?