Help, I really need some advice...?

I am struggling. My entire life I have dealt with symptoms of OCD and ADD. Sometimes I can handle it fine, and sometimes it is overwhelming. My mom told me that she believes I have both, but she refuses to take me to a doctor and be diagnosed. She says she doesn't want to change who I am, but who I am is bothering me. I can barely pay attention to a conversation. Every couple of years I have a few months of hearing things and seeing things that aren't there. At first I thought they were ghosts, but now I'm pretty sure I am just going nuts!! I told my mom and she just denied it and wouldn't talk about it. The doctors spent months taking tests because they found something on a MRI. After months of testing, they just guessed that it was scar tissue. Gah, I keep getting confused and disoriented and I feel like it is just getting worse. Some days I'm fine, and other days are awful. Sometimes I will go from ecstatically happy and hyper to suicidal within a week's time. I also get these days where I just feel so aware of EVERYTHING. Light feels brighter, sounds feel louder, everything that isn't straight stands out, every light and tiny distraction takes my focus. I keep asking for help, but she won't listen. My therapist thought I was bipolar, but once my mom got angry about it, my therapist yelled at ME. I need someone understanding who will just get me through this because the people in my life are ignoring me or making it worse. Please, someone tell me I am not alone and I am not going crazy.