Am I bipolar or have borderline personality disorder?

Im 17 and ive been diagnosed with depression AND bipolar and what you described is EXACTLY what i went through. To make it better i seeked medical and parental help and i think you should do that too. it was the best decision ive ever made and im so happy now. And also since ive been on my meds since february, i weighed 171 and i weighed myself yesterday and now im 147.2. my doctor said its because the meds and therapy are making me happier and im wanting to get out more and its totally true. you should definatly tell your parents asap. don't keep putting it off because when you get help you will be so happy. just trust me girl (: