It amazes me how well we are able to distinguish between the different pain. I've had fibromyalgia for many years as well as migraines. I have no trouble telling them apart. The one thing I have noticed lately that at three weeks+ on Prednisone and I've only had on migraine. It was more of a flirt and took the Imitrex right away.
I keep looking for silver linings... ha.
I'm sorry you had to give up riding your bike, that had to be hard.