Preggo Again...?

I’m on the mini pill but to be honest, haven’t been taking it the EXACT same time everyday (i.e. I’m supposed to take it at 9am but some days it’ll be 9:01am or 9:05am) LO (little one) will be 13wks on Tuesday & I’m breastfeeding which is prob why I still haven’t gotten my period BUT think I’m having signs of being pregnant again!!!! Since there’s no period for me to track, idk when I should take the test...anyone experience this before?