I've never had it happen quite like that ... it doesn't usually wait that long.
I wrote something in my journal a long while ago: to write is to keep writing, to not write is to never write. That's the way it seems to work for me. When I finally manage to get a block of days where I can spend some time each day at it, then the addiction sets in and never seems to let up. If it's not the active project it's one of the others I'm keeping notes on, or a short; there seems always something pushing to be written. When it is going like this I have been known to get to bed and then turn around and get straight back up to write out some new thought. But when life calls me away for a block of days getting that momentum back again can be very difficult.
I figure I must be addicted because, when I'm not writing, I still wish for that feeling that drives me to get back out of bed to write some more.