Variance of severity

Variance of severity I have a block stammer that seems to vary in severity fairly significantly. Usually it is quite mild and not much of an impediment (unless I'm public speaking lol), and then it seems just as soon as I forget I ever had a stammer it comes back in full force. I made a bit of a fool of myself in my job interview this morning. Generally it comes back for a few months or so then fades away, though I'm not 100% on the time frame. Anyone else have a similar experience?