Why don’t I have a sex drive anymore?

I have always had a CRAZY ridiculous sex drive. I was turned on by any little thing and would get wet at just the thought of something sexy/naughty. I started working out a few months ago and got this weird rash I think from the sweat. It all started there. It has now pretty much gone entirely away, yet I notice that I never have sexual urges like I used to. Even when I go to masturbate I have a hard time getting myself to climax and definitely don’t even get wet. It’s so bizarre. I’m only 26 and I feel like I’m too young for this to be happening. I like sex so much and I love getting hot and heavy in the moment, but I’m scared I’ll never go back to having my sex drive again considering it’s been like this for months. Has anyone ever experienced this or have any advice on how to get my sex drive back?