yup, madame, it is. It's not a disease or a condition like arthritis which has a very clear cause (or two basic causes) and progression. It's a label for a symptom - recurrent seizures which can be caused by a whole variety of things, or often there is no clear cause identified, as in my case. When I was diagnosed, the consultant neurologist, an epilepsy specialist (at a tertiary centre so sees the most complex cases) said they diagnose epilepsy after three seizures. And epilepsy after brain damage is very common.
dilemma, presumably they aren't calling yours epilepsy because the drugs didn't work? Although there are a huge range of different classes of drugs, am slightly surprised they didn't try you on anything else. Suppose if you don't have too many seizures and it doesn't disrupt your life it's not worth messing around - the medicines do tend to make you a bit doolally when you are first on them before your brain adjusts.
UQD, gosh, I never knew we had that in common as well as Doctor Who! I've got a (provisional) driving licence now as I've been fit-free for years, which is jolly exciting, if slightly nerve-wracking. (Am crap at learning to drive though, sadly.)