What Causes Vaginal Bleeding After A Fall?

So a couple of weeks ago I was skating at a rink and I used skates instead of blades, and Im better at blades but I wanted to get better at skates, and I was doing thriller around a corner and looked back, lost my balance and was falling backwards so I put my heal back and my lower tailbone landed right on the heal, and it was red and bruised for a few days *note that I am a female and it was legit in the buttcrack* and the next day around noon, I started bleeding from my vag realllllly heavily, and it wouldnt stop until that thursday and it was like a sudden stop, would the hit on my lowertailbone start this? Will I still get my period for the next few months since it was SO heavy for a long time?
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