Pregnant ?

So this is month #2 of trying to conceive. I followed my calendar and around 9-11 DPO I started taking pregnancy tests that were all fainted which lead me to thinking I was but then I thought about Evaps. I didn’t want to wait till my missed period so I went in and did a blood test HCG. Results were <1 which means negative for being pregnant. I was really upset cause I had my hopes super up with these evap lines that I thought were fainted. I’m 2 days late on my period. Can I still be pregnant and just did my hcg’s too early or can it be stress that made my period back up? Thanks xoxo ♥️