Missing my freedom

I had my son and he's adorable and I love him but I miss my freedom. I don't know how 16 year olds handle having babies I'm 21 and feel I had my son way too early. Is there anyone else that feels this way? I read writing down things you miss and fitting them back into your life could help you take back control of your life and might help you feel free once again. How are you dealing with the loss of freedom?