Implantation bleeding?

Em

I got this only when I wiped...there was none in my underwear. I wiped a second time and there was only one tiny spot that time. My last period ended on August 14th. I have taken 3 regular clearblue pregnancy tests and 1 digital the past 3 mornings with fmu. The regular ones had very very very faint positives. The digital one said not pregnant.

8/26 test

8/27 test

8/28 test