So a question about pots. . ?

so unofficially i was diagnosed with p.o.t.s.[postural orthostatic tachycardia syndrome] . . .i went to the doctor and said i more than likely suffer from it and to come back and test in two weeks but i dont have insurance and blood test alone cost a lot of money. my doctor said my blood test was normal so i may not have to worry unless it comes back which sadly is happening now.. . . . .anyways when i laydown or push my body too much when excersizing or emotionally stressed my heartbeat raises very high to the point it hurts or some body parts get numb and i loose control of my muscles and just fall down. also i get very dizzy and nausea especially when im in a car and get extremly tired. and right when i black out my chest tightens and i stop breathing for a few seconds. like 10-20 seconds. . . .. .anyways is that normal? im getting healthcare in sept/oct so i can go do secondary test and get on meds. is there any other way to help my self right now. im only 15