I've never mentioned my depression to anyone in school, apart from a counselor. However I have brought up epilepsy and a benign brain lesion. Basically this was an admission my brain isn't working right. It's also been an issue at work. Almost everyone is personally sympathetic. Academically and professionally it's a different story. Most people take it as an admission that I'm somehow incompetent. I loose their confidence.

In my experience a lot of the talk about diversity, accommodations, and non-discrimination with respect to disabilities is just talk. It may be well intentioned, but it often falls short of reality. It's especially true with conditions that are not well accepted. Others experience may be different. I have had a few professors respond positively, but I'm not sure it was always beneficial in the end. I don't get mad about it, but I tend to think that it's just too much for them to handle. Like you said, you think your tutor doesn't know how to handle you.

The problem with a lot of people in academia is that they have had it very easy and are very privileged. I don't mean they don't work hard, or that they don't have their struggles. But, in order to teach at university most of them have gotten high marks all the way through school. They've gotten scholarships, acceptance, social and professional privilege, etc. What many of them don't see is that it's not entirely due to their virtue alone. You have to be healthy and have the right opportunities. They think the only differences between them and everybody else is that they are smarter, and that they worked harder. To put it bluntly, they're snobby. I don't mean to judge them, but in many cases its true, especially with the younger professors. I feel stupid because I have a brain tumor, they feel like geniuses because they teach college. We all have our challenges.

I find that if I'm falling short in some way things usually go better if I just do my best and don't say anything. They are less likely to remember whatever it was I missed or got wrong, than they are to forget epilepsy and a brain tumor! If you have to give an excuse, I find the best thing is to give as little information as possible. "I have not been feeling well." is usually adequate. That's all they care about.

Don't worry too much. Regardless of what happens you will still be doing your work like everyone else. You have additional challenges, but that's ok. You are not alone.