Hi. 28 yr old female and recently noticed a pulsating/throbbing sensation in my head when lying down. the past few nights it has kept me awake. ideas?

Not sure exactly: This sounds like what happens to me when i pay close attention. But usually i just go to sleep so don't notice it. Might possibly be related to your blood pressure, maybe some congestion in your ears or sinuses. Symptoms like these are best evaluated in person by your physician. Based on the findings, a treatment plan can be developed to help you.