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I am 26 years old and am having a terrible time. I have not had a period in four months, and now I am starting to feel muscle like spasms in my lower abdomen. I have taken two home pregnancy tests and both were negative. I have pressed on my lower stomach to see if I could feel hardening of the uterus but I can't feel anything hard. Could I be pregnant? I am married and not on any form of birth control. Someone please help, I am very concerned. I have a Dr. appointment on February 10th but I need some kind of an answer now!!!!