Undiagnosed Seizures?

I'm 22 years old and for the last two years I've been suffering from seizures. I've been to hospital many times for it and have had many, many different tests but still have no answer. I've had an MRI and ECG a CATScan Many blood and piss tests and have been cleared of any sort of epilepsy.

Before this the only time I've ever been to hospital was when I was like 2years old. I've been pretty healthy growing up.

I'm currently taking Keppra for it. When I first had the seizures I was on 3 different pills and one of them was an anti deppressent and another to boost my iron levels.

I understand why I was given the Iron ones as I did not eat red meat at the time (I've changed my diet now and try to eat it, I'm not too big a fan of it tho) But I do not get why I was given the anitdepressent. Ever since I was taken off them pills and put just on Keppra have slowed down a bit but they still happen and I don't get signs and I can't tell when they're gonna happen so I don't get time to sit down and it usually ends pretty bad.

If anyone has had the same sort of symptoms, hit me up. I wanna know If i'm takin all these pills for no reason cos they are really bringin me down and have made me very emotional and sadly it's taking my sex drive away and I'm only 22 and I love sex so that's the last thing I want to happen!