Hey Chutz, I hope your feeling better by now.
I have taken many different antidepressants over the years and skipping a few doses never really effected me too much in less it was several weeks or more. I take Effexor Xr now and if I forget to take a dose...even one, I most certainly feel it. So if you were without for several days then yeah, I bet you were going into withdrawal symptoms. It should of gone away once you started to take it again.
Please do post again and let us know how your doing. Take care