Hey, I'm 20 years old and for the past few months I have been experiencing some weird symptoms. First, I have been having some headaches, usually dull pain that varies. It mainly feels like my head is under pressure, being squeezed in a vice. Other times it's a tingling feeling on my forehead. The pain is on and off and sometimes when I stick my finger in my ear it feels better. Another symptom which may not be related is muscle spasms in my legs and arms. The spasms don't last very long but they have been occurring more frequently. Lastly, I have been have a sore/stiff neck that doesn't affect any movement. Also, sometimes there is a weird pulsating feeling the lasts for a second that worries me.

What could these symptoms be caused by?