I had a bleed behind my placenta in the beginning, too. It resolved itself. My OB just advised me to refrain from sex and heavy lifting and to take it easy. She said there's really not much else that can be done except to monitor it, and that the majority of the time, they go away on their own with no complications.
Yes I have a Subchorionic hemmorge at 15 weeks. I have a large blood clot in between my uterus and placenta. I had to stop working and on pelvic rest. I go Wednesday for a follow up ultra sound. Praying that my clot has disappeared. Hope that you're ok.