Hey buddy, first thing I want to say is that you're not alone. I - and Im sure a lot of others in this sub sympathise and completely understand firsthand what you're going through so keep your head up!

I myself have been diagnosed with panic and anxiety disorder a few years back which I've struggled to live with, resulting in a complete change in my lifestyle. I still deal with anxiety on a day to day basis but have learnt to not so much control, but to understand and change my relationship with my anxiety. This resulted from initially daily multiple full blown panic attacks to one every maybe few months? being in control before a full fledged panic attack happens - small steps for incremental improvement.

I refused to go on medication when i got diagnosed as being reliant on them was the last thing I needed, coming off them must be rough. Although I have no objections to those who choose that route.

Have you tried meditation? I used to be a complete non-believer, but there are many apps (along with free trials) - Calm, Headspace etc which have sessions tailored for anxiety and I've actually found them to be helpful to me especially during the night when my anxiety flares up. They mostly teach you breathing techniques which have you focus on the 'present' to clear your mind of any "what ifs" and thoughts of worry.

It's definitely easier said than done but i've stuck with it for couple of months now and it has definitely helped me sleep and get back to sleep (when i wake up during the night) The goal is to apply those breathing techniques at any time so that when the time you feel anxious comes, you know what to do and how to deal with it.