any one gone through this?

so my periods have been completely off the last few months and i'm wondering if this has happened to anyone else. i've been off birth control for 5 months. my period started being really weird the third month because i started taking anti depressants. (a small dose) which caused me to be 10 days late and my period only lasted like 3 days which it usually lasts about 5 days. then the forth month i started 8 days late and i only had a small period for two days. and this month i only had a very light period for literally a half a day. i took a test and it says negative. anyone gone though this?