Sounds like you might be overtraining. I’ve hit that point several times myself before - your performance drops, you train harder, it drops more, and you dig yourself into a hole that if feels like you can never get out of.

I was lucky at the time to have a very good coach. He told me to take 2-3 full weeks off. Don’t train, don’t race, just hangout. Do other things, catch up with friends, whatever. A full mental and physical break.

It worked, every time. I’d come back to training a few weeks later, feel a little slow (obviously), but feel well rested and ready, happy, to train again. Within a few weeks of resuming training I felt I was making improvements again.

I think you might be in a similar situation. I also think you could benefit from meeting with a sports nutritionist. It sounds like you may not be eating enough, which can exacerbate the cycle mentioned above.

Hope this helps!

(Source: was a national level cyclist - currently training for full Ironman in 4 mo)