I Fell On My Tail Bone On A Rock About

I fell on my tail bone on a rock about a week and 5 days ago. I went to the er thinking I had broke it. They done an x-ray and said its not broken. since I have noticed small spotting and yesterday it got heavier (its still light but picking up) I finished my period just days before the fall so ik I'm not starting again. My tailbone still hurts just as bad what could be wrong with me (they said my tailbone is abnormal (hooked))