Your doctor is quite right to get you checked out. It happened to me and my doctor sent me for a check and ultra-sound scan. It's not horrible. An internal check (like doing a smear), palpation and then ultra-sound. Nothing was found to be wrong so it was a hormonal kick. Interestingly they found the remains of an old fibroid, which explains the rotten, heavy periods I'd been having. Don't worry about it, go along, gyne. can cope if still bleeding.
Better safe than sorry. :o)