How do you do? How do you go through a pregnancy??(talking about body symptoms, please don't judge)

First I know that everyone has a different pregnancy.

I'm talking to the people that has morning sickness (for me was all they sickness and vomiting) then boobs pain, cramps, now I have back pain,and everybody is telling that is going to be worst...I just feel my body sooooo tireeeeeed , etc, that I think that I couldn't do it again, that I don't wanna do it again. That I don't want another baby! When I get married we want a big family but this is my first pregnancy and i feel that I don't want to go through this never again. I'm 21 w and I feel that I can't do it anymore, that I miss my energy and the way I was. How do you go through this? I really would at least (in the future) have a baby brother or sister for my future baby but I can't imagine again be pregnant!