help please

weird question, but has anyone’s vagina ever become tighter than they remembered? like the top wall seems almost swollen. no chance of infection etc. of course after some internet digging some women said it was a sign of pregnancy, and i’m honestly really scared. i haven’t had any symptoms except for a headache but i think it’s because i’m so stressed about being pregnant. i used a condom but i have no idea why my body is doing this