Hello!

I am a 21 year old female. Some of my Symptoms include Tingling sensation thats hard to describe but it's not a pins and needles static feeling (I guess closest I can describe is using the words "Water drop sensation?").
My left hand will sometimes tremor. For example I will be on my cellphone and it would start to shake in my hand as it tremors till it stops on it's own.
On the same hand my left index finger will jerk up in a way I really cannot imitate on my own free will.
I have one arch higher than the other on my feet with one foot having more ankle pronation.
My legs cramp at night sometimes. and I get feet pain a lot
I've been to neurologists (3) but nothing major is found in tests.
I've done 1 Brain MRI, 1 cervical spine MRI, Nerve conduction studies, etc etc.
Nothing is really found to give answers for me.
Anyone have had any similar symptoms or experiences that have any advice?