Girl let me tell you what happen??

Okay so it's coming to a end to my fertility window tomorrow will be my last day to have sex I guess...and every other day I been having sex but today was different while I was getting it on...I wanted it to hurry up cause I did not enjoy it...is something wrong with that??? I mean the sex is good but today it was off idk what's sup with that but I was like ewwww hurry up seriously! !! & another thing during my fertility window I been experiencing cramps headaches bloating and filling really tried what's sup with that? ??