Sex really really hurts...

Wondering if someone can help??? I’ve been finding sex really really uncomfortable lately like it hurts a lot more than usual, I have also found that my vagina is a lot tighter than usual and we struggle with sex... it’s not because I’m not wet enough because I’m always soaking we’ve tried lube and it doesn’t help.. we’ve also tried different positions and also more foreplay and nope nothing helps.... I was wondering if possibly I could be pregnant? Af was due yesterday but no signs I’ve had really sore nipples but didn’t think anything of it until now? Please someone help 🙃