Can someone explain this all to me?

Sa

I'm 4 weeks and 5 days and yesterday morning I took the last digital I had and said "-NO". I started bleeding last night. This morning I'm cramping and bleeding heavily. So is this a chemical? Also, when should I expect my next period? Hubby and I are willing to try again right away. Something felt off from the moment we found out, so I have to believe that it just wasn't right this month. I will call my doctor when they open in an hour. They closed at noon yesterday and I started bleeding around 4, so I just haven't had a chance to talk to anyone.