I'm 7 months pregnant, does anyone else feel like they really want their life back? Am I a bad mother?

No, it is okay. Such feelings do occur. After all nine months is a long time. There are days when you are up and about and then there are days when you feel low and want everything to get over soon and have the baby out. When the baby will come, no doubt physically you don't have to carry him inside but you will be forever carrying him in your heart. Your baby will take over your life, and trust that you are going to love every bit of it, always.