I don’t know what to do

I think I may have manic depressive disorder. I’ll be over the moon happy one minute and then I’ll feel just empty and sad the next. I don’t feel like I have any control over my emotions and I don’t have any way of predicting them. My dad was diagnosed with it but I haven’t seen him in 14 years so I can’t talk to him about it. My mom doesn’t believe in psychiatry or doctors for that matter and I’m on her insurance so she’ll see if I go to the doctor and take me off of her insurance and I don’t have the money to buy my own or to pay for a visit. What should I do?