Irregular cycles after Nexplanon removal??

C

I recently had my birth control removed (aug 27), my cycles have always been pretty regular on or off of birth control. We’re trying for baby #2. I was supposed to get my period two days ago and have taken a pregnancy test - it was negative.

4 or so days ago I had very, very light spotting. It wasn’t enough to even get on my underwear, it was just there when I was wiping. It looked a little mucus-y, like snot from my nose or something with dark brown blood.

I googled and it says that your cycle should stay the same. Glow says the spotting could have been from ovulation?

I couldn’t possibly already be pregnant - could I? Without even getting a period? I plan on taking another test in a week or so but just wondering if anyone else had any experiences getting pregnant so quickly or an irregular cycle after having the implant removed