Over medicated symptoms gone!

so, started weaning by 50 mg. Since Friday and all the symptoms of rejecting Zoloft is gone.  Rash all gone! Swelling on spine going down! Welts haven't occurred nor have the leg cramps you could die from.  So! Lesson to be lesrned here.  
Is it possible to be on zolofy for over a year and from increasing 50 mg. be allergic? ?
Answer. ..YES