Hey guy so recently i missed my perio my last period was may 16 i am very regular every 28 days i get ny period well this month i havent on the 18 i had a little bit of blood only when i wiped i thought i was getting my period so i put on a pad went to sleep i wokeup and my pad was clean no more blood then on the 20 i had like a light brown spotting went to the Dr negative pregnancy test i also did a few at home they all came back negative ive been haveing cramps and lower back pain but still no period this has never happend to me has this every happend to anyone?