Sore boobs, new little white bumps popping up

Heather • Mother of a beautiful three year old girl🤱 ttc baby number 2

I have a irregular cycle, had sex on the 26th of December and for the last 2 weeks my boobs have been sore. Over the last week these little white bumps have been popping up on both my nipples. When I took a test this morning it was negative could I be pregnant?