Pregnancy test an breastfeeding

Mary

I am according to glow 11 days late for AF. Test this morning an it was negative.

My question is is it possible to get negative results an still be pregnant this late? Has anyone had breastfeeding affect the test? Is it possible for periods to return an then stop while breastfeeding?

My last pregnancy I didn’t test til almost a month after I missed a period because of stress. I’m wondering if I’m testing to early if I ovulated later last month