can cowlicks change over time?

Ok i've always parted on the left because it worked out nicely with a cowlick right on my hairline. Lately I've the hair wants to go the other way and when looking closely it appears the cowlick is going the other direction? Is this even possible or am I crazy? My hair seems to part and lay better now when parting on the right but it bugs me after a lifetime of parting on the left!!!
Brand new to CG - 3/16/09
before curly girl...
I think I'm a 3A with 2A underneath.
Trying to figure out my routine!