I’m nervous for the vet to call me back

My cat had a UTI two weeks ago it went away then came back(I don’t think it fully went away) so I called to ask if I can have a perception/refil of his antibiotics this is his third one so hopefully they refill it. Receptionists said she’ll ask the vet and wrote down my number. I’m very nervous because I just spent the last bit of my money on him.