TMI Knowing after sex you'll be pregnant?

Hello mothers and pregnant ladies... I know this may sound weird but...

I've heard of woman knowing or feeling they were pregnant before taking tests but... What about feeling it right after sex?...

When my fiance and I were having sex, it felt a little different. In a good way... And when we were done, i had this weird feeling inside of me. Almost like an intuition and I still have this feeling... Like something was supposed happen but the plans or future shifted... I know i sound crazy but i had this same feeling the day my mother passed away. Only, that feeling was bad... this feeling doesn't feel bad... Has anyone heard of this? Or am I crazy? ... I mean, i just had my period so maybe hormones?