Weird stomach feelings sorry if it's TMI

Sorry for TMI but when I have sex with my bf it's like his penis is touching my cervix and it feels really tender & senstive, I'm also experiencing some weird belly feelings today can't explain exactly what there like but just feels strange I already have a boy and girl and never experienced this kind of feeling (did find out later on in pregnancy I was preg) I'm due on Sunday is it possible to be preg, I have been googling it & all say it could be early pregnancy has anyone else experienced this? I'd be grateful for any comments thanks