Has it ever occurred to you that maybe answers that you don't like are still valid answers?

Here's you:

I've tried nothing and I'm all out of ideas!

What did you do to try to meet your professor in the middle? Did you talk to your school's disability services? Maybe you did one or both of those things, but you didn't include it in your post, so right now it looks like you have not tried anything to actually help your situation. Now it appears to be too late, and when someone tells you this, you get upset.

They even went out of their way to suggest that you find ways to plan for the future. I'm only "white knighting" this person because I'd have said exactly the same thing and I didn't have to because it was already said.

It's valid advice, and advice that you should really pay attention to if you don't want to continue to make the same mistakes again in the future.