I had My last period September 9th .

I am starting to freak out because I haven’t gone this long with a missed period . I’m confused on why I tested negative .. but I just hope nothing is Wrong with my health wise . I’m not preventing pregnancy , I don’t use any Birth control or Any form of protection . My partner finishes inside me , Could I still be pregnant and My HCG hormones isnt showing up yet? . I don’t feel pregnant .

Although I’m not sure how that feels , since I’ve never before .