Implantation bleeding

Hi ladies im not really sure what’s going on with me, yesterday I started spotting it was only first thing in the morning then nothing the rest of the day, today I was “spotting” it was a little heavier but mostly brown, it was only pink a handful of times, it didn’t fill a pad after being active all day, it was just a spot about the size of two quarters. I’ve been actively trying for a baby, lol a lot, ovulation was 3 days ago but I was having unprotected sex before, on, and after my period. I am a week and 3 days after my last period. I’m thinking it’s implantation bleeding, I tested this morning was a big positive but I don’t know if the test was invalid because it wasn’t Center with the screens on it. Not even the control line. Later took a blue dye test and had a faint line before the waiting time was up and after. HELP!