Felling a heartbeat in my neck lately, also I felt something weird in my stomach

i have been felling a heartbeat in my neck lately and some what something like that in my legs and i'm curious of what it is. SOMETIMES  at night  i fell a heart beat in my neck and i hold my neck cause it feels like my neck is about to pop out . IS WHATS HAPPENING TO ME NORMAL ? yesterday i felt something weird in my stomach  like a kick?