Are you seeing an Endocrinologist for your hypothyroidism? You may need a med adjustment.
Yes, anxiety is awful. And I'm sorry to hear your friends and family are not being supportive.
Have you ever been to counseling? If not, I think it would really help.
I keep looking up on google aswell with my anziety but the fact is google won't help you tbh only you can see whts wrong you google comes up with **** on it I don't even know why I go on it go and see a doctor wht I'm doing planning to see a specialist which I think always help. So hope everythink turns out ok take care
Another thing that might be making you tired is the beta blocker. Are you checking your blood pressure on a regular basis to see if that and your heart rate are not getting to low?
I had anxiety problems last year during the end of my cocaine problem.
My friend who is a nurse suggested that I did the following when I felt one comming on:
1) sit in a dark room
2) breathe slowly
3) put on some relaxing music as this can move the focus of your mind onto the music and away form the panic
After 3 attempts I found this worked and it helped me to reduce the panic symptoms.
Give it a go as it may also work for you :)