AF due 4/29

Hi! Glow says AF is due Saturday, I had my first period in 3 years (after having my first two kids) so I really have no idea how long my cycle is. I thought I knew when I was ovulating because I had a lot of CM on the 14th but then I was cramping on the 18th and thought maybe they were ovulation cramps? So I'm totally confused and hating this two week wait. I've had a lot of odd and on cramping and pelvic pains today. Does anyone have any thoughts or info that could help me? My first two were both conceived in the first month or two of trying.