Private practice question

I am an associate therapist at a private practice under contract. I get paid 50 percent per session. The issue I am having is that when I get paid I never know what sessions and clients I am getting paid for and what sessions I am still awaiting payment on because I am not provided any type of way to track this. Is this normal ? Some of the clients are insurance clients so I know that the payment takes longer. I guess I am worried about wage theft because I am not sure what I have received from what is outstanding and what is owed to me and what I am still waiting on.