"Doctors receptionist being very aggressive to sick patients"

I suffer from severe fibromyalgia and rheumatoid arthritis and osteoarthritis and depression. I asked if I could pick my medicine up the morning it was due as I was going away, I said not early as it’s a controlled drug. But it was done early and now I’m being reviewed by the doctor about my pain medication. The receptionist every time I call doesn’t ask my name and tells me they're far too busy to deal with me then hangs up. I feel I'm being portrayed as a drug seeker by them and they have caused me severe anxiety and pain. I don’t know what to do, I’m scared to phone. I’m scared, I’m being treated like a drug addict, now I’m devastated as my medication allows me to cope with daily tasks but I’m going to be left just existing not living. I’m terrified, feeling hopeless, scared, painful disease.