confused

Alright y'all this is kinda long but I'm confused and need some help! So bf and I had unprotected sex on the 10th, but didn't think anything of it bc eve said my fertile window was gone. Thought I was getting my pre pms symotoms the past week, but I never started and now am 3 days late. Took a test and it was negative but I'm still not convinced considering I have mood swings, heartburn( which I NEVER EVER get), extreme thirst, sore breasts, and white CM a couple days before I was supposed to start. Haven't really been stressed or sick. Do you think eve was off by a couple days and I could be pregnant and just got a false negative? Uh I just have a feeling 😳 help!