My boyfriend and me decided to try for a baby. We last had unprotected sex on Saturday which is very close to when I ovulate! Today I have felt really funny! I have back pain, stomach cramps down 1 side and around my uterus and I feel really tired! I normally have a bit of this when I ovulate but not as bad! Is it too early to show signs of pregnancy?

I think it's a bit soon, though everyone has different experiences. You could be showing really early signs of pregnancy or you could just be psyching yourself up. Breast changes and tiredness usually start after a week. Implantation is about 6-12 days post fertilization.
The only way to tell for sure is a pregnancy test.

Good luck! I hope you get what you want!!