Is it normal that i can't sleep but when i do, i oversleep?

I couldn't sleep.
I went to the psychiatrist just to ckeck if I had insomnia more than three months ago, and they told me that I probably had bipolar disorder; by the way I talked, by the way I did things, by the way I felt... But not insomnia. So they asked me, "what do you do when you actually sleep?"
I always overslept, but then I had a lot of energy and sadness at the same time.
I was diagnosed with hypomania after that.
They also gave me sleeping pills, but I never use them. Only when my parents are too persistent, and they won't let me do anything else.
When I have those pills, I instantly feel regret and less energy; and that's why I don't want them; they are messing with me, with my head and my habits. I know I don't have hypomania, the psychiatrist only said it so I would take the pills and turn into a "zombie" with no personality at all.
I know that I'm right, because when I had them, my friends told me that it looked like if I had anesthesia.
Please, help me.
What should I do??
Is this normal?
I need your help. I don't want to have the pills or to believe that I'm ill. But if that's what I have to do, I will... So just give me your opinions.