YOu need to check with your docotr as to what your restrictions are. He should have given you a list of dos and don'ts as to what you should be doing as you heal. If he didn't, I would make an appt. to see him.
Look back through your discharge papers from the hospital. Sometimes there's a page shoved in there with do's and don't. But like ibake&pray said, do call your doctor to be sure of exactly what your restrictions are. With such a serious injury to recover from, you don't want to take any chances.
As the last poster said you should call your doctor asap and find out what you can and cannot do at this point. I would write out the list of questions first. (I say that because right after I hang up I usually remember something important that I forgot to ask!) It's possible that he gave the hospital instructions to tell you and they screwed up (or they both did!)