@Cinderella24 So sorry to hear what you're going through and, yes, I can relate. I've had more cognitive impairment than OI since becoming ill but sometimes they fluctuate (meaning sometimes I feel mentally close to my old self and OI gets worse).
As for the tingling, and dragging (I describe it as my limb feels like cement blocks been tied to me or it feels like Im fighting gravity). It's always been worse on my right side. My theory is maybe cause Im right side dominant...who knows). Anyways, when I first knew nothing about what was happening to me I kept pushing trying to be normal. This would lead to a total collapse of strength and I had to be assisted walking (at worst carried) to the nearest chair, bed..too often hospital ER. My cognition also slowed dramatically, I would feel extremely ill, light sensitivity, headaches...and the tingling was like electric shocks anywhere from in my head, face,fingers, or toes.
Initially, docs thought I was having a stroke or early signs of MS. I now know it was PEM and I was "crashing". Unfortunately, many doctors and ER's don't know how to recognize it and will assume you're having a panic attack or something else. They were especially perplexed when normal labs didn't show anything and after several hours I was able to regain enough energy to walk unassisted (without medical intervention). Finally, I had a big scare back in July when my right side completely shut down and would not respond to any of my commands. I dramatically cut down my activity at this time and stopped trying to be "normal" until I knew better what was going on with me.
I definitely encourage you to follow up with docs cause if its not CFS, I really wish for you to get a treatable diagnosis and a speedy recovery. Either way, I'll encourage you to listen to your body and don't push till you know what you're facing. It is very scary, but, you're not alone. Sending virtual hugs