Pup that needs sum training

Ok my pitbull/lab mix has been using the bathroom in the house constantly. I keep a regular 45 minute schedule. I'll take her outside and she uses the bathroom and I wait til she walks back to me or sits at the top of the stairs. We will be outside for maybe 10 minutes and she does all her stuff everytime, but then we go in the house and she uses the restroom 2 minutes after we are inside! It's not really me that is irratated, it's my mom, and unless I find some way to fix this, my mom won't let her back in the house. She stays outside for a few days because I stay with my dad over the weekend, and I've tried to get him to let me bring her, but right now she isn't fixed. And over at his house, well those dogs ain't potty trained either. All four guys pee on all the furniture and poo everywhere...it's disgusting. Right now my pup is too young to get pregnant, and she would be with me at all times or in the same room as me, but yea, that's a problem I gotta beg to my dad about. But I just don't know why she is using the bathroom as much as she does, I feed her at scheduled times and she is still constantly using the restroom. Usually it's just peeing. I own a crate and she has only used the bathroom in it once that I can recall. But anywhere else and she constantly goes where ever. My mom and neighbors have told me to show her the mess and whip her. But I know that doesn't work, so what I have been doing is just saying "Evy, you know your not supposse to potty in mama's floor. You don't do that." And I don't yell at her or nothing because I don't want her to get scared of me. That doesn't build a bond with her. And she hides under my bed when she's scared, or even just a little freaked.

Also, she has a chewing habbit. And I gave her toys to chew on. But she keeps chewing on my stuff, like a couple of weeks ago she went over to where my speakers were and I guess she pulled them off by pulling on the cord, but yea she chewed the wires up, not the speakers themselves, just the wires. They weren't pluged (plugged) in THANK GOD!

I would also like to know if there is a reason behind her constant hiding. If someone walks in my room she goes straight for the bed. But when she's out in public or the living room, she climbs all over people. Which reminds me, is there any way to keep here from that. Because when you are sitting or standing she jumps and climbs all over ya. I would also like to know if there is any way to keep her off the furniture. My mom would love if I can fix her restrooming, jumping, and jumping on furniture. Thanks to anyone who can help me :)

[lindapalm]

My first suggestion would be to never shout or hit her for peeing,  or anything else, it won't help at all, and might be the reason why she hides under the bed, shes afraid of being yelled at. You sound like your really trying hard to help her, and I'm sure you can.  Have you ever watched Cesar Millan, Dog Whisperer, on National Geographic Channel?  If you can get it, it might help you to watch.  When she jumps on you when your standing, don't pay attention to her, or even look at her, turn and don't face her.  Only when shes calm can you pet her or talk to her. If she jumps on furniture, push her down and say No, it might take a million time, but she will finally learn.  I would put her in a crate at night to prevent her from peeing, and let take her outside constantly during the day, even if she only went a half hour before.  Praise her a lot when she goes outside.  As far as the chewing, she will grow out of it, give her toys to chew and try to keep anything valuable off the floor.  Taking her for very long walks several times a day will also calm her down.  Good Luck