Is this normal?

Priscilla
I started my period February 24, and ended March 1. 
I took ovulation tests based off of Glow and when it said I'm fertile, but all the ovulation tests came back with no LH surge. 
Buuuuut... March 20-22 I did get an LH surge!!! 
My expected period is Marcg 28 (again according to glow) 
I've been on a 3 month pill cycle for about a year and stopped taking it about a month and a half ago, so I don't know what is normal for my hody. Advice and feedback please 😊