Patient :I had unprotected sex about a month ago. I had just started a new pack of birth control (same birth control) and took it on time the first day and 3 hours late the second day. I had sex on that second day. I got my "period" as normal. It's been a week since my "period" and I do have some back pain should i be worried about this being "implantation bleeding? or am i just worrying for no reason.
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