Goodness, sorry to hear about your experience. But two weeks is roughly how long it takes most people to normalize to a dose change, up or down.
I have heard about single and/or small doses of prozac being quite useful to fend off initial withdrawal symptoms, but that was for coming off venlafaxine, which has very short half-life. I think the idea is to go from a shorter half-life substance to a longer half-life one.
Another trick that I remember, also from coming off venlafaxine, was to take small doses of benadryl (diphenhydramine). If I remember correctly, the later is a
nonselective serotonin reuptake inhibitor which actually got the whole search started for the SSRIs, back in the 1960s. There is some anecdotal evidence that it might help tamp down some of the scarier SSRI withdrawal effects e.g. the brain zaps and such.
Another thing you might do is have a look at those 'natural' substances like St. John's Wort which we are all supposed to avoid while on certain SSRIs... the things that appear in the warning list for serotonin syndrome. See here:
http://en.wikipedia.org/wiki/Serotonin_syndrome
Perhaps you might be able to pick up some St. J's and get some benefit.
The single most beneficial thing any of us can do, I strongly believe, is to commit to a rigorous and regular exercise regimen. Really, none of these SSRI meds is a whole solution; healthy brain chemistry requires good exercise and good diet etc. too. Ideally, we'd all have everything in place before dialing down the SSRI, but unfortunately, a lot of people rush things too much, and/or get poor advice from an inexperienced GP, and don't have a proper strategy in place for coming off.
How long will you feel the discontinuation symptoms? Well, if you're already long past the half life and still feeling them, then they may persist until you develop a more aggressive strategy for dealing with them. Perhaps the brain has lost some of its ability to adapt to changes around certain receptors. Then perhaps you may even need to retrace your steps i.e. go back on the med and dial down slowly.