Left sided weakness that comes and goes?

[Snl21]

I am a 26 year old female that is in otherwise healthy condition. Every few months, I get a very odd sensation of weakness in my left hand, left arm, and left leg. This sensation of weakness usually lasts about 1-2 weeks. It happened in July of 2017, December 2017, and now, July 2018. I have had a CT scan and an MRI which both came back normal. I have also had 2 appointments with my neurologist. This is more of a “perceived weakness” as I cannot notice any changes in gripping, picking things up, etc. I have a check up appointment with my neuro in 2 weeks. I just get so much anxiety not knowing what is going on. Is there anyone who has had similar symptoms? Or at least one sided weakness that comes and goes? It causes a lot of anxiety which I’m sure does not help with the weakness.