Possibly may have ADHD, how to get diagnosed without losing the shirt on my back?

UofT student here. I had always had an inkling that I maybe borderline ADHD - typical things no concept of time, very poor organization, hyper distractibility, always late even if my life depended on it, racing thoughts and mind, etc. But as soon as I started my unstructured part of the program here, things started completely unravelling for me.
I talked to H&W doctor, they said they don't do diagnosis at H&W for ADHD and they certainly cant offer any medication or therapies without it. They said they have psychotherapists at H&W but they are not allowed to diagnose ADHD. I was afraid that they have shut it all down because some students maybe trying to "game" the system to get accessibility accommodations, so I told them that I do not need any accommodation as it would be looked down upon in my program anyway. Apparently, I can go external if I want to get diagnosed and that would cost around $1000 - $2000. I just cannot afford that in anyway or form.

My academic and personal life is completely unravelling because I cant get anything done. This is also leading to feelings like anxiety and potentially depression. Can someone please help with suggestions/advice on navigating this and the UofT/H&W system pertaining to this? I would be grateful. To add, incase its relevant, I am an international student that's also an RA.