Hey guys, im 16 and haven't dreamt for quite a while but when i was younger i usually had a nightmare a night.

Anyway when i was laying in bed trying to get to sleep i used to hear my heartbeat but instead it was coming from my head, it was a small throbbing usually in the front right side of my head( i am left handed). It was real, as in i could put my hand to my hand and could feel it like how you can feel your pulse in your wrist although this seemed much more clearer and powerful. IT didn't used to scare me that a small part of my head throbbed but it did scare em because i knew i was going to have a nightmare, usually the louder and more powerful it throbbed the worse the nightmare would be. Interestingly im not sure if it was my heart beat because if i put my hand to my chest i wouldnt feel this large throbbing and the thorbbing in my head wasnt exactly fast or anything, just strange i guess, any thoughts?