Yeah I used to get exactly this too, the pins and needles out of nowhere used to really freak me out. I stopped eating processed foods, anything with sugar, gluten, lactose, salt or additives and it stopped within a week.

I get pins and needles and cramp mine is my cholesterol tablets they have a side effect I can't stop taking them my cholesterol will go up again

Yes, quite often. But I was also diagnosed a while back with Postural Orthostatic Tachycardia. My blood pressure drops and my pulse goes wild

I used to get palpitations which they thought was my medication as put on amitriptyline for my ibs but turns out I can have caffeine so have to have decaf tea and coffee also know paracetamol with caffeine.

Yes! Every once in awhile I do get palpatations and I have to sit and wait it out.