Help with getting custody of Aubrey

Hello, everyone. My name is Nathan Hansen, father to Aubrey Hansen. Aubrey is a 4 year old bundle of adventure and joy but, most importantly, the reason I do everything I do. I have recently run into some issues with the way her mother (who I now have joint custody with) is living her life and I feel uneasy about allowing her to take Aubrey back to live with her. I am seeking assistance in what I'm imagining to be a fairly hefty lawyer fee and could use all the help I can get. Anything is appreciated and I can assure that, for the safety of my child, I will be making all of the necessary steps in winning her back. Thank you for your consideration.