When is my cat going to give birth?

Ok so i was out on vacation my mom was house sitting and let my cat out and couldnt get her back in. I havent had the money to get her to the vet yet to get her fixed so please dont tell me what i should of n should not of done to prevent this pregnancy. These kittens will be going to a church and will all have homes so theres no need to answer this question rude. thank you. So any way my cat got out 67 days ago today. she was out for a week. some time in that week she gotten pregnant. so now my question is when is she going to have her kittens? can any one give me a time frame from now till when should i expect them? what should i expect to see happen before she goes in to labor? i have been checking down there to see if it was dialiting but alls i see is some yellowish stuff that looks like snot sorry if tmi.... my cat seems like she is tired and is awalys just laying around. but today i did notice her peeking around in my childrens dresser drawer and laying inside it. is this where she plans to have them??? i have a box for her but she dosent like it and jumps right out... some help and good answers are needed thanks every one in advance!!! and 10 pts to best and most detailed answer