Numbness & pin prick. Issues are normal?

Hi, I'm been suffering by numbness and pin prick, mussle cramp while sleeping & rarely differences in heart beat for about 2 - 3 mins in the night. I am taking treatment for the same from local neurologist from last 1 yr. Ininitially he started with calcium, vitamin D3, etc things not improved went to other neurologist he took while spine scan and said you are fine nothing to worry. Went to another neurologist to double check he tested with shock all the nurves leg and arms. He said results are k nothing to worry. But after all these still im suffering by numbness in arms during my sleep everyway. When I read articles in internet it's seems like cardiac related issues. Which Doctor would be right to treat my issue Neuro or cardiac??? Or is my issues are normal? Thank you