I’m A 25 Year Old Male That Has Recently Discovered

I’m a 25 year old male that has recently discovered that he has a fetish. Ever since puberty I have been extremely turned on by girls that wore thongs( underwear) . Like on a scale of 1 to 10 I might find a girl attractive but if she wore thongs too then it would make the attraction a 10. I never really thought much about it until recently and I have become greatly concerned about this. I have been reading online about how fetishes are a type of mental disorder that needs treatment and it has been giving me a lot of anxiety . I have almost been trying to convince myself lately that I don’t like my fetish and have been trying to bury my feelings. I can “get off” to other things besides my fetish now if I try but it still makes me feel like all these years I’ve had a terrible mental illness. What do I do now I feel like some sort of freak. Should I try to take libido reducing medication so that I don’t get turned on by my fetish?
Also it says on the Wikipedia article about paraphilias that fetishism is a subset of paraphilia. Well paraphilias include everything from bdsm to even bestiality. It gives me a lot of anxiety to even be considered in the same class as something like bestiality in terms of them both being a “paraphilia” . it sickens me and I feel gross.