Feeling so miserable

This sunday I will be 30 weeks with 2 girls. I am so huge and miserable that it's hard for me to function. Whether its walking, laying down, doing normal everyday things, etc. Its even hard to breathe sitting up, walking. I go to the fetal doctor on monday and imma tell him I will go till the end of 36 weeks but no longer, I cant do it. My body is reacting so bad. Has anyone felt that they are ready for their babies to come and want time to hurry up?