Bipolar disorder; people are one of my triggers. What can I do?

I was diagnosed with Bipolar Disorder at the age of 13, and I am now currently 18. My mother decided to opt out of the medication that was prescribed to me but my depressive cycles are getting worse and I am now considered a adult. Before I started isolating myself, my mania was VERY horrible but for 2 years now or so, my mania symptoms come into play when I interact with people or when the summer months roll around and my depression sets in any other time. In my depressive cycle, I neglect to take care of myself, I stay within my house or in my room, I'm anxious and nervous etc. Because people can trigger both cycles, it's a catch twenty-two. When I isolate myself, I'm normally in a depressive cycle and I don't take care of myself but when I'm around people (especially my age) I become manic and it's very horrible to deal with me. I also would prefer to be alone because of my anxiety attacks. I have other triggers as well, but it's almost impossible to live any sort of life without interaction with people in general. I have some mania tendencies every day such as racing thoughts (especially right before bed) and some anger/agitation (to which I just go to my room) but currently it's the depressive cycle that's killing me. I plan to go to the psychiatrist very soon and get medication to stabilize my moods. But what can I do until I am able to go? What do I do after the doctor prescribes medicine, will my depressive cycles get better but also control my mania? I'm just so confused and feel helpless.