I Have Been On Zoloft For Several Years And I

I have been on Zoloft for several years and I have the shakes which I attribute to the Zoloft. However I have been shaking more than usual. I have some samples of viibryd and consider trying that to see if the tremors subside. I'm getting worried that my tremors might not in part be th Zoloft. I have a history of Parkinson's in my family. I am beginning to loose some balance. I am a 64 year old female with no health problems. I hav not taken my Zoloft for two days and this morning took a low dose of the viibryd. Is this ok that I did not ween myself off the Zoloft