HELP!!

So this past little while, I have felt like a single mother (because it is hunting season) and I have to say, I have a lot of respect for these mothers. By the end of the day I am so worn out by my children. I feel like I have zero patients with them and I have felt like such a terrible mother at the end of every day. My kids have not been minding me at all and they never listen unless I start to yell. I just figure that I need help in my parenting skills. So then this weekend, it was nice to have Adam around a little bit. My kids seemed to do better and I felt like a better mom. But then on Sunday during the morning session of conference, Hallee came out of Hunters bedroom and her hair was all wet and parts of her clothes were wet. I looked to see if the bathroom doors were closed, and they were. So I figured that Hunter had poured water all over her. So I went in his bedroom and found him hiding under his bed. I finally got out of him what he did to his sister. He told me that he had peed on her head while she was reading a book. I about died. That is so gross! So we got Hallee in the bath for the second time that morning and started cleaning up the mess. I don't know why in the world he would do that. I kept thinking to myself what am I doing wrong. I also found out that he has been peeing in his bedroom garbage a little bit. Then last night I find out that he threw like 2 cans of paint down grandpa peterson's outside stairs over the weekend. I guess he was trying to kill the spiders down those stairs. So, if anyone has any parenting tips for me I would gladly appreciate it! I just don't know what to do!