And how long did it last?

I've been having what I'm beginning to think might be an implantation bleed for the past couple of days. I've had them before, both times were literally a small brown bit on the toilet paper a couple of times. This time I had a small brown bit of mucas on the toilet paper on Wednesday evening and assumed AF was coming and then nothing more until yesterday morning. Yesterday morning I again had a small brown-tinged amount of mucas (only when wiping). I then had it on and off when going to the bathroom yesterday (sometimes it was there, sometimes not). Today I have what looks like very small amounts of watery brown blood (again, only when I wipe).

Does this sound like implantation to you or a very slow lead up to AF? If AF hasn't shown up by early next week I'll test again, but just wanting to know thoughts/experience in the meantime.....