Blood tests!!!

Trace • I have a 18 y.o. Boy. 14 y.o. Girl. Ttc since 2015. Miscarried Mar 2016/May 2018/Oct 2019/Apr 2020/Apr 2021/Nov 2021/Aug 2022/Dec 2022/May 2023. Ttc our 🌈 baby.
I just got my results they told me negative!??? I'm 5 days late for AF today. I'm never late! Had tubal reversal surgery on November 5th. I am having early pregnancy symptoms. I've taken HPT just for them to be negative. I'm confused could I still be pregnant? 😩