Speak to your doc about the limits.
You should have a hospital limit quoted overall (=-R1 mil/annum) and then a separate amount for psychiatric inpatient, as well as outpatient.
I spoke to my T about this and she says that if my psychiatric outpatient benefit were to be used up, she could write a letter and motivate to have more of my overall limit allocated to psychiatric issues, as this is what I'm dealing with right now and need help with.
I'm sure your doc will know about limits and how to work around them.