Hi, I am a 26 year old female who is not trying to conceive but wont be to upset if I do. my period has been sort of regular most of my life( bleed six days every 15-21 days in between. usually two periods a month.) my second to last period was odd: started a week early, bleeding for 3 days then spotting for rest; total of 7 day period. due to regular sex, unprotected with boyfriend I went to doc and test came back neg. however 28 days later I had my next ( most current period) 3 days long,  then nothing, not even spotting. I have  been noticing some weight gain, headache, mild upset stomach, tender breast, perkier breast, bra not fitting properly, odd food cravings. should I retest?