Hi Jason. You are allowed to be pissed, and hurt, and angry. But dude, don't give up. Please.
There is a psychologist named Elizabeth Kubler Ross and she has a theory about grief - stick with me for a minute. When we find out about our diagnosis, it seems like a horrible thing, and that we are losing 'something', our health, freedom, sex-lives, etc. You need to go through the process of grieving when you lose something.
Basically the smart psychology chick says; there are 5 stages of grief and loss; denial, anger, bargaining, depression, and acceptance. The sh*tty part is that it's not linear - you don't spend 2 weeks in denial, then move to 2 weeks in anger... You bounce around like a stupid pinball and it takes as long as it takes. And it's different for everyone. https://www.psycom.net/depression.central.grief.html
At any rate, you need to go through these things and it will suck. But you'll be stronger. I'm super proud of you for reaching out. It was very brave. Again - dude, don't give up.