Period late?

I there I have a question , my hubby and I have been ttc since august, well i was suppose to get my period oct.1 and i havent seen it keep in mind however i tested a few days before my period and it was all negative also my daughter just turned 1 last week and I'm breast feeding.

Not sure if I should retest or is it late because of breast feeding. I just don't want to get all excited and the bummed out.