Don't feel bad about venting, it's cathartic and hopefully will make you feel better.
Diabetes is a REALLY bum deal and it's not fair and it's not right. You're by no means the only one who ends up thinking 'why me?' so you don't need to feel alone. You don't sound pathetic in the slightest. You sound like the rest of us. You sound like a human being.
I'm absolutely no authority on pregnancy, but I doubt that elevated bg could cause a termination. Don't feel bad. This is NOT your fault and I'm sure that you will be able to have a baby. Keep trying, at least that can be quite a fun part

, and remember, there's still lots of options available to you to help you get pregnant.
Take care. You're going to be just fine, and we're all here for you.