magnesium levels and epilepsy?

Hi all-- I'm a 46 year old woman who was diagnosed with epilepsy 4 1/2 years ago. I take zonisamide and am trying to lower my dose and do lifestyle changes to combat the seizures. The zonisamide seemed to increase issues with depression, short term memory problems, and issues with words to a level that it just messes with my life. My neurologist has okayed me to decrease again from 300 to 250mg and eventually to 200mg if I feel ok with it. So far it's going well. I've been researching ways that I can improve my health overall and hopefully decrease my likelihood of seizures as well. Last summer I worked with a doctor who did allergy testing. I've taken 9 foods out of my diet, moved to a more plant based and home cooked diet and have lost 30lbs. I feel a lot better. Recently, I decided to add in coconut oil. It's hard to tell if it's doing anything, but I figure whether or not it stops my seizures it's probably good for my skin and hair, right? This morning I was running across a number of articles on magnesium levels. I took a look at my health history and didn't find any tests of my magnesium levels, but did find that my sodium and chloride levels have consistently been quite high at least since 2015 when my medical history goes back to online. I'm currently taking 350mg of magnesium, but wondering if increasing the dose might help? Anyone with experience with this?