Spotting for 2 days

Hi ladies! I've always been one to get my period full blown from day one but I was also always on BC. Since having my second I decided not to go back on BC for multiple reasons. We're not actively trying for number 3 yet but it's a back and forth convo of possibility. I get my period every month but no set cycle yet (anywhere between 28-35 days). 2 months ago I spotted for a day, stopped my period, then started full blown a day later. Got my period as normal last month.

Starting Friday I was spotting again. I wore a light tampon but didn't fill it at all. The bleeding stopped all day yesterday. I woke up again this morning to spotting-wore a light tampon and didn't fill it at all again, just a brownish color. It stopped again and completely. I know there's a possibility it's implantation bleeding but the tracker just keeps pushing my due date back 2 days! Anyone else experience this regularly?! Could it simply be stress induced?! Don't want to get my hopes up but the uncertainty surely doesn't help!