Welcome Monopoly and Mam!!
Missmya84- I think it's probably post O symptoms. At 4dpo i had all the same signs as you, plus i had really sore boobs (which actually got more tender all the way up to AF), i got all excited thinking it was implantation, (which it wasn't). I really do think it's too early to tell. I hate how our bodies give us the same kinds of symptoms for O, AF and PG. Keep us updated and for you!