I don't see how you could tell which med isn't working , your on 2 heavy hitters... Both has the ability to bring you down, possible too low, depending on dosage and how your body metabolizes the medications, I guess.
Certainly talk to your case manager, maybe she can get a hold of your Pdoc and get you in sooner.
Until then, Try to make sure your enforcing your daily self care, sleep hygiene, exercise, healthy eating, etc.. All of the self care you can do is going to help your overall mental health not just physical health.
Hope you get some help sooner than July , that's just too far away.