Advice please could it be implantation bleeding?

I had Sex 1 time in my fertile window cause hubby had to go away for work. I ovulated cd 17 I'm pretty sure had sex cd 15. Period was due April 3rd, On Friday April 1 I started spotting pink then it turned into a light period I never have light periods, mine are extremely heavy and lots of clots too.  I always have cramps pretty bad first 2 days. This month it was a light period for like 2 days then it stopped and it came back again it's a brown color now and I'm still spotting a little today April 6th and I'm having pains like u get when u ovulate😩 I have no idea what is going on right now.. 1 other thing is I alwYs get sore boobs without fail every month before AF and this month absolutely nothing. Is there a possibility that was implantation bleeding?