Strange body...

So my body doesn't like me. I was 4 days late and kept getting BFN and had a shorter period than usual. Then this past week, after intercourse, I bleeding pretty hard for about 2 hours. I don't understand what's going on with my body. We've been TTC for 11 months now and it's so frustrating to not get any results. I'm going to see my doctor next Tuesday but I'm still going crazy about this. Anyone else have this happen??