Not sure when I will be ovulating

Jessica • Mom of 3 ☺️

I use Glow and another fertility app and they do not agree as to when I will be ovulating. Glow says my fertile window starts tomorrow and the other says it starts June 16. I don't use OPKs or anything and have been taking my BBT this month. I don't know why but I'm intimidated by OPKs. Is it worth giving them a try or should I just plan to have lots of sex the next 2 weeks? 😳