I been late on my period for about 2 months now, and i have taken numerous pregnancy test and they all come back negative. I have been extremely tired and have not been feeling well at all...i test almost 3 pregnancy test and all the result is negative..what could i do..pls help me..May last perion is january 27,2015 and until now may montly period is not coming..i stop using pills how many months already..what should i do please help me with my problems..?.thank you..