Implantation Bleeding ? Or Pms

Arymis • Expecting The Unexpected 👪👶🚼
OK So I Asked This Question before. On April 13 me and My boyfriend had unprotected sex . He came more than once . I was expecting a period on the 14th it came on the 16th which it was extremely light and lasted for 3 days . Since then we've had sex 4 times with the same outcome 2 of the days was during my fertile window and the second was my ovulation day . I've been having pregnancy symptoms out the Ass with nausea fatigue, headaches , etc then today some light bleeding starts . I'm not supposed to have a period until the 18th . Light cramps usually I can't even move with out crying and it's bright red but a little dark . Usually on my first day of my period I'm pouring out blood but today it's weird . Help PLEASE . Has This Happened to Anyone Before ?