Hi @Esther2 and welcome to the stroke club no one ever wishes to join
And now that you are here, you can be doing a few hand exercises while you’re scrolling through the post 
First off though, you are 30 odd years and this is real life, not the play ground. People will not mock you! They just won’t! And if anyone ever did, then they are clearly mentally immature and should be pitied because they’ve clearly got a problem and no real friends to call on in a crisis.
I presume physio gave you several exercises to get on with. But have you been doing any practical movements you would have naturally done in your pre stroke life with that arm/stroke. Things like reaching into cupboards, lifting a cup to your mouth. Try hold a can of milk in your stroke hand and lifting it up and down. And basically trying to involve your stroke hand in everything you would have done without thinking prior to your stroke. Natural life skills are far more important to retraining your brain than physio could ever do. Because those actions and movements are already in your head, your brain just needs to figure out a new pathway to them if it can. That’s why its so important to be doing these things from day one, alongside your physio exercises.
Things like reaching and grasping door handles, carrying the rubbish bag out to the bin, taking the wheelie bin to the kerb on bin day. You never forget that stroke/hand, never leave it out of anything you would used it for in the past. And you try 3 times before you resort to your good side.
But if you don’t even think to try incorporate your stroke hand in your daily life anymore, then eventually the brain is not going to even try to make those new links. It’s running a reduced service as it is, the only way its going to remember that arm and hand are even there, is if you don’t treat as a useless piece of flesh stuck on the side of your body. Hence the phrase use or lose it.
I know it’s easy for me to say, mine was a minor stroke and I eventually got back the use of my arm, leg and speech with only minor issues now in comparison to you. Your stroke was clearly more severe so there is no way anyone can tell you whether you’ll get back more mobility or how long that would take. But in the mean time you also have to learn to accept and adapt. Concentrate on what you can do, not you can’t.
This forum has provided helped a lot of people, over the years I’ve been on it, in coming to terms with their new self. Encouraging and inspiring them, there is whole new way of life out there. Have you tried any local stroke groups or any other social groups that would get you out of the house for a few hours. I go to an Aphasia group once a month and also a strength & balance class once a week, where I’ve made so many new and understanding friends, who accept me as I am and not all afraid to ask for my help, even despite my disabilities 
Lorraine