Zoloft and allergist

hello, zoloft caused a number of negative problems that even my pcp could not believe at first until i was sitting in his office and he watched my lips swell 4 times their size, welps as big as a fifty cent piece all over my body that itched beyond belief. a cough that made me vomit several times a day, indigestion non stop. he sent me straight to an allergist that said my lungs air capacity and dropped to 40 percent. they also did not believe it was the zoloft that i had been taking for several months. I stopped the zoloft and within a few days everything return to normal, i ask my doctor to put me back on zanax, which he did and was also convinced that the zoloft was not for me. my allergist billed me for 1500.00 to tell me nothing. Sometimes u had better follow your on instincts. The doctors do not know as much as u might think.