Can you tell when youre ovulating?

Ok this is almost embarrassing. I'm almost 30 and a few months ago i started to get really horny for a few days every month. Because of this app I realized it's when I'm ovulating. I don't even have to look at a calendar to know when I am because I get insanely turned on for those few days and it seems to get worse every month. Has this happened to anyone else? Is it an age thing? Normal?