Spotting

I came off my pill in May mid pack and since I have had 2/3 day light periods (spotting) I don’t know if these are my actual periods or not.

This month I had a 2/3 day light bleed and 2 days after got spotting when I wipe which is pink.

At first I thought it may of been implantation as I had 2 faint positives on a pregnancy test but now negative.

Any one else get this and got pregnant? I’m just a bit worried that these aren’t periods and that it’s going to take ages to get pregnant if at all.

I already have a 2 and a half year old son.