Help! Birth control concern

Hey y’all so I got off my birth control in September/October and my period after that was normal. The next month (November) I missed my period but I didn’t have sex so I knew it was from getting off the pills. On dec 21 I had unprotected/protected sex (he put the codom on after it was off for a little). I thought I had symptoms which very well could have been that I was eating a lot. I took two tests yesterday and they were both negative. 😭 there’s no chance I could be pregnant right?

And my period is supposed to come on the 27th on every month !