Is it normal to lose most of my sexual desire in my mid 30s?

I decided to not put it up to vote, because I think it's subjective to my own personal experience (aka is it normal for me, which it's not, I've always been pretty turned on)
and what might actually be going on.

It's gotten worse the past year. Maybe the past two years it's gone downhill. I used to masturbate daily, with or without porn. Not really addicted, per se, just habit. Also, a habit of not getting laid for a variety of reasons, and masturbation always worked, so why not? Pleasurable and felt good.

Except the past year it's been feeling less and less good. Now, I'm at a point where I can't get even get aroused by my own mental fantasies. I'd have to look at porn to get hard, which to me is like a warning sign. I've always been able to get off real good on my own fantasies, and watching porn just made it come more alive. Now, oftentimes I'll get off once every few days, and while pleasurable, my penis and groin area kind of hurt a little after. I don't have a VD, because I haven't gotten LAID IN YEARS!

I'm trying to go longer and longer without masturbation. It's been such a go-to, the only way my sex life exists is with my hand. And now it's not working.

This week I went 3 days. And it's not like I broke it because I was super horned up. I wasn't. I could have gone longer. I just wanted to see what it felt like again. Sure enough, I wasn't in any mood to fantasize, so I looked at porn. I notice I get off wayyyy too fast to porn now, in the past it used to take me a long time, finding a right video, to get me to climax.

It's weird and not normal for me. I'm 36 and feel like my libido is tanking like it's supposed to in it's 50s or whenever. My desire is low. I've been suffering worsening stress, depression and anxiety in the past year. (COVID just added to that)

I'd like to think having a real dick in my face would spark me up again. But it seems like no one wanted to hook up or messages me back on sites, which is just a bummer and makes me more desperate.

Any advice?

I can't even crush on a guy, or have those feely-good feelings when really turned on. Seems a lot of the love has drained away. So I wonder if this is more mental/emotional than it is physical.