I am trying to regain custody of my daughters either 50 percent of the time or becoming sole custodial parent. There has been some medical neglect.

To evaluate your situation it would be necessary to learn more facts.  Some of what I am going to ask will sound harsh, but there is no way to help unless these issues are examined.  How and why did the father get primary physical custody?  How serious is the medical neglect?  Do you share legal custody? How old are the girls? Are there issues with his girlfriend's parenting?  Are there questions about your parenting?  To what degree is child support a consideration in the percentage of parenting; to him, to you?  Is he out of town on business?  Is this a change from when the original allocation was made?  What would the father's take on all of this be?  Do you have the emotional strength to go through another custody battle?  Do the girls?  Why is it in the girls' best interests to be with you?  Can you afford to fight the dad?  Even a firm like ours, where we charge $150 and hour and have payment plans, can be expensive, and there are no guarantees.  We don't charge for the initial meeting.  I am sure that other firms would not charge you either.  It is going to take more than a few lines on an internet posting to be able to help you decide what you can and should do.  You should consider your answers to these questions and meet with someone to discuss your options.