Libido disappeared and I can't think of a single reason why?

About 1 year ago, my libido dropped to pretty much zero, almost no morning elections, softer erections, less semen, etc, and it's been like that ever since, however I went on vacation to turkiye a bit ago and my libido returned to normal soon after I got there, weirdly though, when I got home it slowly went back to being low. Some time ago I experimented with supplements like zinc and stuff which kinda worked but didn't really bring me back to those og levels. I'm pretty active, get good sunlight, I eat well and get 7-8 hours of sleep a night, I'm not stressed or depressed at all (and vacation didn't really change that) and my bloodwork is perfectly fine, just what the HELL is going on? And what can I do about it?