I'm so confused...EDIT

So I know there are a million of these posts but if y'all could share some insight that would be so appreciated. I haven't had a period for 3 whole months. Before that I was pretty regular. I knew that I could get pregnant without having a period because you ovulate still. Normally my periods are 7 days long and soooo heavy then they trickle down throughout the last 3 days. Well, 3 days ago I had super light pink/brown spotting for an entire day, then a smallllll amount of red blood the next day, then heavier red blood the next day (not like I usually have though, lighter than normal but took up a whole pad throughout the course of a day), then NOTHING today. Like a faucet was turned off. Nothing else. Done. Has anyone had anything similar and it be implantation?

**I took an HPT several times up until maybe 5 days before the bleeding started. They were all BFN but I haven't tested since. If it was implantation then I couldn't test for another several days anyways though right?