So just to clarify its the eye that flutters not the eyelid. And its not present all the time. Fluttering movements of the eye generally fall into what is called nystagmus. Most nystagmus is present all the time. Intermittent nystagmus can be part of seizure disorders, intermittent use of alcohol or narcotics/cannabis/opoid/drug intoxication. If your mother has the same problem is could be a rare hereditary problem.
Kaja- I wondered if you ever found any answers to your condition? I assumed drug use wasn't the problem. You state that your mom has been diagnosed with epilepsy but did that include an abnormal EEG reading? I've heard of many people misdiagnosed that turned out to have other conditions. There are verified EEG readouts with spikes during and after a seizure for a confirmed diagnose of epilepsy. Don't take mom's diagnose as gospel unless this is the case.
To your case, only a small percentage of the time is epilepsy inherited. Your eye flutter could manifest in the brain and present as your eye flutter. But it's also possible that there could be an issue with your trigeminal nerve. There are three branches that control muscles/sensory input that involve the ear and eyes(among other things) as well. You're not clear on what your "ear issue" is but if your sensitive to noise it's possible it relates to the trigeminal nerve. Other people have astigmatisms and their seizure/eye flutter activity has gotten worse as their sight gets worse.
Please do some research on this nerve to understand it and what it controls before you discuss it with your doctor. Or consider getting a second opinion from another doctor.
A couple of questions- Is there any commonalities when your eyes flutter? Bright lights,Glare, time of day, tired eyes, sunlight, in other words "triggers". Also, what color are your eyes? Thanks!