Here is some info I found for you:
I'd call a pro
Hello! Here is some great information for you, as well as what Jeremy has posted. Good luck to you.
You can do this if you follow the above link and have all the tools, skill set and confidence. I would hire a professional knowing my limitations.
If you are not comfortable and knowledgeable about plumbing, please hire a plumber. Small, unseen water leaks in bathrooms can cause a lot of expensive problems.