Biggest headache, literally, ever in my life inm

I never serious headache before except when I had flu.  Starting from 2 days ago, however, I had some serious headache, and it was getting worse and worse, up to a point that 10 minutes ago I felt like something was trying to tear my head apart.  I also found it odd that the pain spot seem to move around, from my forehead to the side, and now being staying at the back side of my head.

I am really eager trying to figure out what in the world is causing me to have to crazy headache (or migraine, which seriously I have problem distinguish them).  Here's some tidbits about my life in the last 3 days:

• 3 days ago (Tuesday), I had lunch with bosses.  In order to "get in crowd"  I ordered a cup of espresso.  After 2 to 3 zips,  I stopped and couldn't take it anymore.  It was super too strong to me.  Notice that I didn't have headache on that day.
• I was starting to struggle on iPhone database technology CoreData since 3 days ago. and still haven't resolved the problem yet.  My original plan to spend half a day to learn it and half a day to implement it.  After 3 days and I still couldn't make it working, and in fact I might need to go back to square 1 this weekend and learn it from scratch in order to understand it inside-out.
• I was started working at home since Wednesday because I don't have a iPhone development enviornment at work.  I need to get back to the office since I need to attend a business lunch meeting.
• I have never had a headache so severer in my life before
• I was NOT having headache this morning until I get to the office, and started thinking about how to integrate the mobile dev, winform dev, SQLExpress DAO dev blend together without people stepping on each other

I still tend to think that the headache is a psychological thing.  Maybe I'll be better if I turn myself out.... forget about work .... forget about learning ... think happy thought ... think happy thoughts .........

meow