Sounds like your kiddo is quite similar to my almost 3-y/o. We also had an issue when he changed room recently at preschool where he would come home and tell us about all the fights he'd been in that day - hitting, kicking, pushing... it had me worried when it continued for a couple of weeks even though he never had any marks. So we investigated, and it turned out he was largely making up stories and exaggerating the events of the day. Such as, someone bumped into him on the playground being viewed as a personal and deliberate attack. Our son is very sensitive, so I think this made him more prone to exaggeration. This may not be what's happening with your child, but maybe an avenue worth investigating.
