If you have taken all the tests & they are negative, it's more than likely that you're not pregnant. I get really sore boobs & cramps when I'm due for a period. The best thing to do is relax & stop stressing. If you stress too much they will be late, it used to happen to me all the time. I was actually 2 weeks late just before my wedding & I got them the night before I got married. My periods were so abnormal for quite a while & I know exactly how you feel. I used to go months without getting a period & then when they came I only had them for a maximum of 4 days.

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