Holy sore nipples

Rebecca ā€¢ TTC for 5 years, 2 ectopic babies, 1 less tube. Praying for my šŸŒˆ baby.
My nipples have felt like sand paper was rubbed along them for days now. Took about 4 hpt all negative! :( going to the obgyn tomorrow I'm so hoping for a little baby sac to show up on the ultrasound. I have low progesterone I'm hoping that's causing the negative hpts. Where is my Hcg hormones?