Tww—when to test

li

Help! Glow and Ovia are giving me two different estimates for my fertile week/AF. Glow says AF starts 4/29 and Ovia says 5/3. I reeeeeeally want to test on or before the 27th while my family is visiting cuz they’re not here often and it would mean a lot for them to be here when I find out!! But obviously i can wait if that’s just too early. Any advice? Thanks! ❤️