Confused... please advise

I had a positive pregnancy test on Wednesday mid morning. 2 negatives that night. 2 negatives Thursday first pee. 1 negative yesterday morning. 1 negative this morning. I am a week late on my period and I FEEL pregnant. The heaviness in the uterus and the slight discomfort in the hips.

Full information: I have a 7mo old. Currently BFing (no decrease in supply). Regular period since 8 weeks postpartum got it every 28 days. I am a week late now. Had morning sickness while brushing my teeth Wednesday which is why I tested when I got to work (the positive test).