Help ! Period back after 1 depo shot but

Raenise

I was on depo for * only 3months * I only got one shot after that never agan ... I never went back for my second shot .... I didn’t have my period for a couple months ... and got it March 10th last month ... I’ve bin having a lot of unprotected sex latley and my next period was suppose to be April 7th it says I’m 2 days late ... I took a test and it said negative .... I’m so confused can someone help me ? 😭