I get my period when I climax??

Whenever I climax (just fingering myself, no partner) my period comes in a gush and it’s extremely irritating. Been happening for about a week now. I’m an older teen, virgin, never used any toys just my fingers. I’m on the ring for terrible periods, which usually stops my period altogether, but now whenever I climax I get a rush of blood from down there. I can’t climax with a tampon I’m so it’s doubly irritating. Does this happen to anybody else? What’s causing it? Should I get checked out by my OBG/YN?