How old are you TS if mind asking ? Early 20/30 or late 20/30.

By the way as another member said you need a psychologist/counsellor/therapist because physiatrist will just keep giving you pills to temporarily rest your mind. You need to solve the root cause to this. If relationship is the issue, perhaps look for couple therapy. I wish you well.

I went to my usual GP and was prescribed Xanax. I am almost to the point of abusing it because the dosage given to me no longer works. I don't really depend on it now because I still have to face my issues the next day.

I am in my late 30s here and dealing with stagnant life (in every aspect)
I feel like I have to live this way on autopilot until my last breathe for my sanity. Sometimes when the body and mind can no longer take it, you will be numb automatically as a way to cope.

We may not have the same issue but you are not alone.
I am not a normal person. I am going to be 39y this year with ntg. Life has been stagnant in every aspect. Feels like trapped since born. Often wish I could be diff like everyone else.. achieving some milestones in their life. The only way out is to accept it is what it is by changing perspective or just wasting away..
I am in between and it is a struggle.

Talk about lung cancer, Smoking also not yet ban

Thats a contributing factor..major or minor. There are a lot more contributing factor TS is aware or unaware of. Insight only can be gained with knowledge. If the mind and body is strong, emotion will be more resilliant.