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I had s_x back in December and since then I've had my period every month. However, I read that you can have your period and still be pregnant. I took pregnancy tests, and they all said I wasn't pregnant. Then, just to make sure I went into Planned Parenthood and they did a urine test, and told me I wasn't pregnant. I keep having lower abdominal pain and my stomach feels like its constantly on fire or something. I went into my gyno and had my anual exam and she didn't seem to know what the problem was. But, I'm definitely not pregnant, right?