lots of pain

Im having lots of Braxton hicks contractions sometimes as soon as I stand up and I have them on and off even while sitting down. I don't think they are regular but I just keep having a lot of them. I'm drinking plenty of water so I know that's not a problem. I'm also having sharp pain in the lower part of my uterus when I walk and when I go to the bathroom sometimes I hurt so bad in the cervix area it's hard to "go". Also Some lower back pain but I just chalk that up to third trimester aches and pains. This is my 3rd pregnancy and I'm 29.2 weeks. Is anyone else having these issues or any suggestions?