<s>[INST] Hi, I have missed my period for 2 months now and I have felt cramps and pain in the lower back. Slight nausea and headaches and recently diarrhea.  I have always been regular and now I am stressed out because of this missed period. I have take 8 pregnancy tests which have been all negative however I have read that I cannot only rely on hpt. After 8 negative home pregnancy tests can I still be pregnant? I am 26 years old and I have been extremely stressed because of this as I have never missed a period. Thank you [/INST] Hi and welcome to Chat Doctor. If you people had unprotected sexual intercourse during unsafe period then chances of pregnancy are more. If you are pregnant the HPT should come positive in at least one test among the 8 tests you have done, I don't think all 8 Hits will give false negatives. It would have better if you had visited a gynecologist by now. There could be some other reason for missed periods or the way of doing HPT could be wrong. Please do it one more time using early morning urine sample, if that also negative you should definitely consult a doctorNausea, diarrhea, cramps all could be due gastroenteritis caused by food poisoning. Don't be stressed and consult a gynecologist as early as possible. Regards Chat Doctor.  </s>