What could cause pain down center of abdomen and back and bleeding with nausea?

Answer:
No contributor to this site can diagnose illnesses, diseases or pregnancy over the internet, nor is it the purpose of this site for them to do so. The best that can be offered is general advice which can never be personal to any asker. If you are truly worried about your condition then you must seek local medical attention.
First answer by Lazarus. Last edit by Lazarus. Contributor trust: 1080 [recommend contributor recommended]. Question popularity: 1 [recommend question].