stopped periods after birth control??

i was on birth control for about two years, i had to be taken off all medicine because i had to get blood test done and couldn’t be on ANYTHING. i stopped it in January and have had two periods since then (one at the end of January and at the end of February) both were normal, but since February 26th i haven’t had a period. i’ve had some cramping and i’ve been really bloated. i took a pregnancy test and one had a SUPER faint line and it was at night, the other was in the morning and didn’t show anything. has anyone had their periods stop after being taken off BC?