Discouraged and upset

I’m on day 13 of my period. My bleeding is very spontaneous. I will go hours without bleeding then I will be bleeding enough for a tampon. It goes back and forth and has been like this all 13 days. No cramps or pain. My last period was in April. I’ve never been diagnosed with anything and my doc can’t see me until the end of the month. What is wrong with me? Why can’t I just be normal??