Hi,
Some times
epilepsy needs to be treated with combination of anti epileptics which is happening in your case.As your seizures were not controlled with single drug you were put on a combination, although I feel adding two new drugs at once is not a good idea as it increases the side effects ,which is probably happening in your case.Wait for some time to see if your symptoms settles if not you need to discuss with your doctor to reduce the dose/ taper off one drug.
Secondly a prolonged heart burn needs investigations like
endoscopy to rule out any structural problem, you may need to see a gastroenterology specialist for that as well.
Thanks