Erica,
First a huge virtual hug to you, I am also suffering chronic anxiety, it started 8 months ago for me, no reason at all, i improved a bit then mid june had a huge relapse and am in anxiety hell.
I feel intense fear and panic constantly, i feel it when going out too and really struggle to be left alone as well, my husband is my safety blanket although sadly i panic even if he is with me, just opening the front door has me in a state and my whole life is consumed with anxiety.
But i can give you some hope, note that i improved slightly before and what keeps me going is that surely i can again and as much as it might not seem possible now you can too.
Propanolol can be great for physical symptoms but it wont help the emotional distress, it's really important to make it clear to yur doctor just how much you are suffering because there are other medications and many,many therapies that can help you too.
The answer lies within you as well though, this is the painful part but the truth, the hardest thing you will have to do but the most important part of your recovery is to slowly face your fears.
Remember slowly, no need to run out of the house and go for miles or even for long, no need to send your partner out for hours, that's not the way to do it at the start you start with gradual exposure, this is best done with a therapist but you can do it yourself too.
So at the moment leaving the house makes you panic, even thinking about it does, I promise you I know how that feels because I am the same but I also promise you that along with the right help from your doctor facing fear is the only way to overcome it.
It takes time, a lot of time for some people but let's say you can't leave the house at all, start by walking into the garden if you have one, look at your street, focus on a spot say a few doors down and walk there and back, you will panic but that is okay, it wont harm you and it will begin to retrain your brain, it sends a message to the brain that the only thing to fear is fear itself.
This fear depends on our very dislike of it to exist, we cower away, we avoid it and it thrives on that so by facing it eventually we stop cowering, we look it in the eye and it does us no harm and that fear becomes less important and diminishes.
It does take a great deal of patience and practice, you will have times that are hard then times that are harder than ever but it doesn't matter how hard it is, all that matters is that you try and you keep trying until one day you will notice it wasn't so hard that time and then you can move on to your next goal, slowly going slightly beyond any comfort zone that you have.
If you have a setback it doesn't matter, you accept that and try again another time, I had the worst day ever yesterday, was 100% certain that I would never leave the house again, I went out today, did a bit of grocery shopping and took the kids for lunch, I did panic, I did feel fear but it was beyond what I thought I was capable of and I think sometimes we underestimate our own strength.
You must never beat yourself up or be hard on yourself, I have to have my husband with me to even try these things, no matter, you have to cope however you can.
I was having panic attacks if my husband left the room to use the bathroom, now I can manage to distract myself a bit, tonight I managed to distract myself whilst he tidied the garden, it's just slow steps, you can't rush it or do it all at once so pick small goals and work towards them.
Are you in the UK? If so has the doctor referred you to the community mental health team? You can also sef refer for many therapies these days and some will do it online or over the phone, your doctor should have a list of places for this, ask about that and ring around.
Good luck, i promise it can get better but you do need the right help and support in place and facing fear is the only thing that will eventually reduce it xx