Can you ladies give me some insight? 🙏🏼

Hey ladies. Okay so my last period was December 26-30th of 2016. I hate unprotected sex the 22nd of that month as well. I got absolutely no period the month of January 2017, and took about 5 tests throughout the month with no positive. Although I did get about 5 blazing positive OPKS while testing for pregnancy. Fast forward to this month and I got my "period" last Friday the 17th through the 21st and it started off as red spotting which never happens and got heavier, but still not like a normal period. The 22nd through today I've had brown spotting that I only need to wear a pantyliner for. I had unprotected sex earlier this month but unfortunately don't have the date. I'm just wondering if this Bleeding could've been implantation? I'm normally very irregular so I'm wondering if you ladies could give me any insight? Do you think this could be a possibly pregnancy? It's so hard to track whether this could be because I'm not sure when I ovulated anymore since I had no period last month. Thank you so much for reading this!