Hi lorienlouise, welcome to CWE!
As mentioned above, everyone reacts differently, and not everyone can control their seizures with alternative approaches. You should be very careful if you are aiming to reduce your medications or go med-free entirely, and you should definitely keep your neuro in the loop. (I've tried several times to go med-free, without success.).
Here's a good place to start for general info:
http://www.coping-with-epilepsy.com/index.php?p=alternative-treatments
This link will take you to the CWE forum that focuses on diets:
http://www.coping-with-epilepsy.com/forums/f39/
You might also take a look at this book: [ame="http://www.amazon.com/Epilepsy-New-Approach-Adrienne-Richard/dp/0802774652"]Epilepsy: A New Approach: 9780802774651: Medicine & Health Science Books @ Amazon.com@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51p9fv6oOYL.@@AMEPARAM@@51p9fv6oOYL[/ame]
Generally speaking, supplements for epilepsy either complement a low carb/low-glycemic style diet (for example, coconut oil), address a nutritional deficiency (for example, magnesium), or have a drug-like effect (for example, CBD oil). You'll find a lot of interest and anecdotal advice here at CWE, but no single path that can be guaranteed to work for you. If you are making substantial dietary changes, it's a good idea to consult a nutritionist in addition to your regular doctor and/or neuro. And you may need to be patient -- for many, dietary changes can take a few months to have an effect, and there can be an element of trial and error.
Finally, don't despair if you continue to require anti-seizure meds. There are many different ones out there to try, and you may find something that is more tolerable than the ones that are problematic now.
I hope you continue to have stable health. Congrats on being done with chemo!
Best,
Nakamova