Dissertation Adhd Extension (help a stressed girl out!)

Silly question. This could just be the stress in me talking right now. But how likely do you think I am to getting an extension for my dissertation (mitigating circumstances).

I have a letter from my GP implying that I may or may not have ADHD based on everything thats been going on since childhood, but there's not much they could do as the waitlsit to actually get diagnosed is too long.

I submitted the letter in for a previous extension and got it granted. I spoke with my Uni's disability team, but they implied that there was nothing they could really do as i'm in my final year and (at the time of speaking to them) only had 2-3 months left.

So now I applied for another extension using the same excuse and even mentioned that i contacted the disability team etc... Just how likely am I to getting that extension? Cause this thing was due yesterday LOL.