when should my period start?

Mary • 37 yrs old and just gave birth to my rainbow baby 2/22/17 after having had 6 losses and I'm expecting again on 2/9/18
weird question here but this is my first month using opk's but third month using Glow and ttc. Ive always been on a 29 day cycle. i think Glow was using just the "average"predictions for my ovulations...until this month! my opk turned + about 3 days before Glows prediction...without the opk im due for af march 30 but....with my +opk Glow has moved my af date up to march 26! Which should i listen to? i dont wanna test too early, i wanna be patient and wait till af is due but idk when shes due and im dying to see if we did it this month :) lol......any input is greatly appreciated