It's your body and your life therefor it's your decision. I can definitely understand your doubts. Nausea and vomiting are scary to me almost to a point of phobia. I've stopped taking Effexor twice and never had any problems with nausea. The rest of the withdrawal thing... yes it is that bad for some of us. It was very bad the first time I stopped. The brain zaps and another sensation that is just indescribable are awful. For me there was also there was also a problem with controlling my temper and almost total loss of patience. But... when it works, it works very well. The second time I stopped it was much easier. Taking psychotropic meds is always a roll of the dice.
I hope you find something else that helps.