Will I find peace???????/?

Sorry this is so long, I am 15 years old and I have recently been diagnosed with mitochondrial dysfunction. Two years ago I felt in perfect health. Two years ago that all changed in a short while when I developed mitohoncdrial dysfunciton. Only recently have I been diagnosed and I have been learning and trying to deal with all this. I am seeing a counselour but I am still coming to grips with everything. I found out recently it is inevitable that I will be in a wheelchair due to this disease. It hurts. I am in pain every single day with no relief (because I do not want to get addicted to pain kilrs). I also go through stiffness tremors, involuntary falling, nausea, etc. I am awaiting a prognosis for my form of this disease and I am scared. I don't know how to deal at all. Thre is a possibility this is terminal and I am freaked. I am very scared. I'm scared I won't be able to be independant, get married, have chidlren, be like any other gal my age. It doesn't feel like I'll ever find peace but I want it badly. It just hurts so much, everything from all this. I feel angry, sad, upet, guilty, regretful, all these emotions under the sun. I don't know how to feel properly. I have been crying a lot. I'm talking to my counselour and my family bt I still can't get a handle on it it feel slike .Help? Is there hope for me? A future?