I Was Diagnosed With Bell's Palsy N November. I Took

I was diagnosed with Bell's palsy n November. I took prednisone for 3 weeks and one week of valtrex. Even though it looked pretty nasty it cleared up completely in one month. It returned yesterday on the opposite side of my face and I am back on prednisone and valtrex. To complicate matters I have a chronic uti for which I am taking Citroen.. one bacterial med and one viral med. what is all of this medicine going to do to my immune system?