Can i just call Dr.’s office?

I went to a Dr. in an express care because I had BV, I couldn’t be able to take the gel because it busted all over! Then I went back and they prescribed me the pills and I took them everyday! I’m finished taking them, I’m on a medication called Atarax because I have a rash/hives all over my body that comes and goes with itching. Now, I just came up with a horrible yeast infection. Can I just call and ask to see if they can prescribe me through the phone? 😩😩😩😩