Update:
Thank you to everyone for your helpful advice. I was ready to give up and just pay for the private prescription, but with the help of that website, I was able to get the help I needed.
We contacted PALS who explained that a lot of the problem is that the Department of Health website says one thing, but the guidelines on the NHS website say 6 months. But the wonderful lady directed me to a practice that would register me, and they gave me an emergency appointment to get my prescription. And, thanks to the advice here, I also found out that I qualify for exemptions from prescription charges since I'm epileptic.
So, thank you thank you thank you for encouraging me and my husband to keep fighting.

It turned out to have avery positive result!!