Hello, I would be happy to help you with your question.
If you are actually 15 3/7 weeks right now, you would have conceived around July 27th. If you had a pregnancy
test in September that was negative, then you were NOT pregnant in September, and your assumptions about being 15 weeks are incorrect.
In the first year after depo, cycles can be extremely irregular. You need to go into the doctor and get a blood pregnancy test to sort this out. If the test is negative, then you are not pregnant.
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