the tingling sensations may be from your body just waking up. you know how your foot falls asleep sometimes when you sit on it or whatever it's very similar...i get that when i sit for hours at a time and i don't get up my butt feels numb and when i switch positions i get a tingling sensation, causing the circulation to get moving. you may be sleeping in one position for too long and the circulation gets slower in this certain area of the body.as for the nervous feeling maybe your blood sugar dips during the night? do you eat sugar before sleep?that doesn't help. try eating something with protein in it before bed like a peice of sandwich meat or a glass of milk. this used to happen to me. my blood sugar would dip in the night and my body would wake me up in panic. i am not diabetic either. my doctor told me i had mild hypoglycima(i spelled that wrong). i started to eat a bit of protein at before bed and i don't wake up in the middle of night with panic or dizzy feelings anymore. so it wouldn't hurt to try what i did. you should also talk to your doctor about, they can do a better blood work check than you, just to be safe.ya never know it may just be a mineral deficiancy or something.