Pregnant or not?πŸ€”

I used the clear blue ovulation kit and got my smiley faces on 7&8 April. We BD on 8 April and my period was due 22 April. I did a pregnancy test yesterday and this morning both were a clear negative. This afternoon I thought I had gotten my period instead it looked like implantation bleeding. What is going on? Could I have ovulated later and implantation is only happening now? We are TTC since Nov 2017, this is becoming depressing 😭