Don't know been cat is due

[Seb17]

I rescued a cat 2 weeks ago. She is very pregnant and I don't know how much longer she can go. She is very big you can see her kittens move they look like they jump. She went into the box I made her yesterday. She dug around and stayed in it for about an hour and I haven't seen her in it again since. She is not sleeping quite as much today and has cut down her food a little. Her nipples feel full she has like milk pockets under them. I as just wondering if anyone had any idea when she could go into labor. thanks!