One step pregnancy test evap or positive.

Im 2 months postpartum we are not TTC iam also breastfeeding which worked for me as natural birth control In the past. I’ve spotted a little here and there after postpartum bleeding so not sure if it was my period or not. I know it’s different for everyone but lately I’ve been cramping a lot thinking af (aunt flo) is coming my way but nothing. I’ve been testing with dollar general pregnancy tests and all come out with vvvfl within 10-15min. Idk what’s going on maybe these tests aren’t good what do y’all think?

Anyone test with these before?