I've been taking fluoxetine for almost 3 years. I probably should have tapered off at some point, but I've felt like its kept me sane and I've been scared to stop taking it. My original doctor who prescribed it left about a year after I started taking it, and my pharmacy just kept refilling my prescription so I've just continued taking it ever since. It's only 20mg. About two weeks ago I started experiencing VERY bad depersonalization at night. Every night since has been the same. It's slowly gotten worse. Now I've been having random bouts of sobbing for no reason, a high sex drive which is very out of character for me, and a few other symptoms that are freaking me out such as turning on a light or putting on my shoes and not remembering having done it. I don't know if I'm having a manic episode (never really had one before) or serotonin syndrome or something else completely.. but this all started exactly around the time that I picked up my last bottle of pills. My anxiety brain is telling me that somebody tampered with the pills or they're empty or they're actually a stronger or lower dose in the wrong capsule. Or maybe it's just a side affect of how long I've been on the meds.. can SSRIs build up in your system until they cause serotonin syndrome even if it's a relatively low dose? I'm REALLY freaked out. I feel constantly jumpy and on edge like I'm about to drop dead any second.

I've also been back on birth control the past two months, but didn't have any of these side effects last month..