Happy Birthday. And yeah... It sucks. I'm T1, and have bounced around from job to job most of my adult life (and currently) without insurance.
My advice: First of all, keep a positive attitude, be patient, and do what you can. Don't get depressed or self destructive. You will find a lot of dead ends. Life isn't fair. A lot of things that are supposed to help you won't. Even a minimum wage salary is too high to qualify for help sometimes. Do what you gotta do. Don't feel like you need to talk to collection agencies. Just hang up the phone and go do something else. You're worth more than your credit score.
You can order some supplies from Canada without a prescription, and a lot cheaper than in the US. You can also buy some things cheap on Ebay. Just be careful.
It's good to be friends with doctors. Sometimes they hook you up with a prescription, free samples, a bottle of insulin now and then.
Don't be to proud to ask your parents for help if you really need it.
Remember you're not alone. Keep your head up. Good luck, kid.