Why does 16 week puppy pee in her crate?

So I've never noticed this until now, but her crate is always drenched in pee...This whole time I've been wasting my time wondering why she pees inside more than she does outside, when she even does it in her own crate. For example, today I took her out at 9pm and I put her back in her crate. About an hour later she pees inside it...She always drinks water right after she pees Idk why, but yea...I'm pretty sure she NEVER holds her pee in at night as her bed was filled with pee. I took her bed out and she still pees on the blanket. The crate is about 2 feet wide, and I only have her blanket and toys in there and I leave her in there for 4 hours max, and not all at once. Can someone tell me how to fix this because I don't want to wait until it's too late and she is 1 year old and still doesn't know where to pee and poop. Yes I found her on the road and she has been peeing everywhere for the past month and a half and my dumb sister has been using those retarded potty pads which just confuse them more, so how can I get her out of the habit of peeing everywhere? She should be holding her pee for about 2 hours, but she can't even hold it for one. I got Nature's miracle and cleaned up her pee with dish soap and put a new blanket and then sprayed the NM in her crate and she still peed inside it... :( Idk how I can potty train her if she pees where she sleeps oO Sometimes she even pees inside like 20 minutes after she pees outside. also I saw some white stuff coming out of her...you know wat a few times, but not anymore. Is it an infection? I've taken her to the vet but never had her urine or anything checked out, just de wormed.