Irregular symptoms for me close to expected period

Okay so we have been trying for a baby for some time now, and this is my cycle, I have been having irregular cravings today out of my normal pms cravings, food that would normally make me gag as the smell of, then when I got home I had some fast food (I know not the best choice) but it has never made my stomach hurt but directly after i had only what I can explain as an aching over my pubic bone lower than normal pms cramps for me. I have no idea what is going on an AF is due in two days. Anyone experience this?