[didgeoridoo]

> Restarting the SSRI of course did the trick

No, not "of course". It is very possible that stopping and restarting drug treatment will put you in a different place entirely, and you may find that things that worked for years just don't anymore. You say it above, but it really cannot be overstated: if you are on a psychotropic medication regimen that is working, for the love of god don't fuck with it except under the supervision of a trained psychiatrist.