Anyone going through this?

Just had my second big bleed and I'm o- so I need Rogham. My question is this. How often with a subchronic hematoma, do I need the shot? I had it at 5 weeks, I'm now 7 and am on prometrium. I went through this with my daughter as well so I'm not stressed just kinda forget. On another note, I have 0 symptoms...i wouldn't even think I was pregnant unless I had seen it..lol!