What do y’all think

So I stopped taking birth control like 2 or 3 months ago and my last period was Oct 28 and it lasted 12 days. I had sex with my man on Nov 12,Dec 11,14,16. I took a pregnancy test when I was 9 days late and it was negative, now I’m 25 days late. Should I be worried? Or is it normal since I stopped taking birth control?