My cat is pregnant and HUGE.?

My pregnant cat is very big. I don't know when she mated but she's pretty far along the gestation period. All she does is sleep, eat and lick herself. She always goes up to my parents room under the bed and just meows. You can see the babies in side of her kicking and you can feel them. Also, the area around her nipples is cleared. I have no clue when she will give birth. HELP!!!