It's a very good idea to stop Enbrel until you are sure you're over whatever
you have.  It's probably just a virus, maybe one that went into a sinus
infection - you might have been more susceptible because of the enbrel, but I
doubt that's why you go it.  You'd be having this more often if that were the
case.

However, using enbrel with something like that can allow some really nasty,
evil secondary infections to develop.  Both my docs want me off enbrel during
any crud I come down with and when I've had infections I make very sure it's
cleared up before restarting enbrel.