Im starting to doubt my choice to go to uni

Im now going through all my interviews and im really exited but i have a gut feeling and a horrible doubts that i shouldn’t be going to university. I’ve never been away from home for longer than a week and i have epilepsy that isn’t controlled very well. Im scared and i really don’t want to let my family down by saying you know what I’ve changed my mind now. I really don’t know if i should go.

Is the reason that you've never been away from home for longer than a week that your epilepsy isn’t controlled very well?
Why is it not controlled very well? It it because you don't take a very "responsible" attitude towards it, and so don't even try to control it particularly? Or is it because you try hard to control it, but your epilepsy simply doesn't "behave"? If it's the former, then that's a lousy reason not to go to uni. You're effectively saying, "I can't be ars*d to look after my epilepsy, do need to be near my parents constantly so they can look after me."
Also, when you say "away from home", do you mean the physical building or do you mean your parents/family? I ask because I suspect that most teenagers haven't spent more than a week away from their parents. (Although they may well have been on a family holiday which lasted more than a week.)

Im 25 and a late starter to uni , I take 5 different medications for my epilepsy daily morning and night never miss a dose , I follow all my doctors instructions and do everything I can but my seizures just don’t behave. I’ve never been away from my house or family or hometown for longer than two weeks. I’m filled with anxiety about small things like finding a new doctors surgery , a chemist that keeps my meds in stock and little things.

OK. That sounds like maybe staying either at home (and commuting to uni each day) or at least staying close (so you don't have to switch your doctor, chemist, etc.) might be a good option.
Do you have offers from any unis which are close-by? (I'm assuming you haven't made your firm / insurance choice yet - have you?)
Are there any medical schools nearby anyway?
Or, we could look at this differently. You say that your "seizures just don’t behave". You've been away from home / family before, albeit never for more than two weeks. Have you had a seizure during one of those periods? Was it a complete disaster, or did you cope? (In other words, what are the likely ramifications if you were to have a seizure whilst away at uni?)
I suspect that there's not much you'll be able to do about switching doctor, but if you established that getting hold of your meds was an issue, you could always arrange for your prescription to be filled your usual chemist, and have your parents send you your meds. In fact, might switching doctor potentially be a good thing? A fresh perspective on your condition might yield a review of your meds, which might prove beneficial.

When I’ve been away I’ve had seizures and the people with me gave me my meds and I was safe a few times I visited the hospital but I obviously didn’t die. You are right maybe a new specialist could be refreshing.

Does that mean you're considering going to uni, even if only on a trial basis, to see how things go?

Yes I’ve had more offers come in and I’m very exited now.