Confused! Help!

Peggie
Guys,  I'm really confused. My opk's were positive on CD18 and CD19. Fast forward to today, I'm having extremely sensitive boob's.  My nipples are tingly and swollen.  Bbt jumped from 97.7 to 99.1. ve been crampy for the last 2 days and intense back aches. It's way to early to have symptoms, I don't know what's going on.