hello, my head feels extremely tight and i have a constant pain in my forehead it also feels very tight, when i sniff or laugh it hurts and i can feel a sort of pop at the top of my nose and then the pain gets worse im getting scared now as ive had this for about 2-3 days, is there any need to worry? it also feels like when you hang upside down and all the blood rushes to your head, Thank you