What does a migraine feel like?

I've had a horrible headache since Saturday, off and on. Sunday was the worst, even some Motrin didn't get rid of it. Even overnight sleep didn't get rid of it. At first I thought it was a bad head cold because I was all achey and running hot and cold. I popped two motrins Monday morning and it was gone shortly after. Today I have another and took one aleve and it didn't even take the edge off.

My brain feels like it's pulsating and wanting to bust out of my skull. Leaning over to put LO down in the crib is absolutely brutal. To give you a pain threshold reference, the last time I took Motrin was after delivery, a year ago! I'm not one to take medication willy nilly and don't get regular headaches.

Does it sound like migraines?
Maybe it's hormonal imbalance and my period is coming back?
Can stress headaches be this painful?