Looking for help or explanation to new extremely bothersome headache

Hi everyone. I'm new on this and decided to make an account to look for insight on something that has recently been extremely uncomfortable for me. For the past two weeks I've had an extremely debilitating headache. So bad I have to lay in bed all day. The pain is in both of my temples and the center of my head. I have tried literally every over the counter medication and none work. Went to my doctor he gave me (farva?) not sure on spelling for migraines did not work. I went to the ER that night where they gave me reglin and something else that didn't work either. I waited another week then yesterday it was so bad I couldn't open my eyes or wall straight I went to the ER again they gave me denedron? Not sure on spelling and something else then it got so bad they gave me Percocet which seemed to help a little bit more. I went to sleep and of course woke up this morning with splitting pain. They said it might just be from stress as I have severe panic disorder and GAD and cannot leave the house. I just started lexapro for that. Also had 2 clear CT scans. I am getting an MRI and following up with my neurologist. Currently I'm on .05mg of xanax 3x a day. For the panic. I am 22 6'2 235 and was always in good shape and active until these panic attacks. Also smoke about a half pack a day. Just wondering if anyone can help me figure out what's happening as I'm having a hard time believing these are "tension headaches" when I'm relaxed and not doing anything I can barely even move lol. Thank you for help.