Placenta Previa

I'm currently 15 weeks pregnant and on Friday my doctor told me that he was concerned that I might have placenta previa. I'm going in for an official ultrasound to see where my placenta is attached this next week. I was diagnosed with a subchoronic hemorrhage early on but I recently had an increase of bleeding and he believes that could be a factor. I've been bleeding for 8 weeks now so I'm not sure what to think. Have any mamas been diagnosed with placenta previa and what was your experience? Did it end up moving by the time you had your 32 week scan? I'm definitely not looking forward to a c section and I would really like to be able to have sex with my husband at some point. We haven't been able to this whole pregnancy so far and I was starting to think it would happen soon.