My coworker gets my blood boiling!!

Amanda
I need to vent... I have had this coworker who keeps moving all of his crap into my cubicle.  It always irritated me before, but now it's getting ridiculous. I am not supposed to be lifting super heavy boxes (spotting before, the doctor said to take it easy on lifting). Everyone else in my department helps out and doesn't want me lifting, so it's been okay. This other guy treats me like his personal assistant and keeps turning my cubicle into his dumping ground. Today he moved a box filled with over 1000 decals on my desk. I nicely said "I can't really be lifting a box that heavy, can you move that back by the other decals?" And he just said "well it can stay here for now I guess." Am I overreacting for being upset? I have NEVER played the woman card, but this guy treats women in the workplace like a joke. I'm not the only one who has noticed it. I just needed to vent :)