Nervous to start Zoloft

My POTS is pretty mild I would say, I've got quite a bit of anxiety that causes short lived flare ups every once in a while but theyre manageable and nothing thats ever made me bed ridden or sent me to the ER. I handle it pretty well and I'm not very inconsistent with taking electrolyte supplements and staying hydrated. I'm dehydrated most of the time honestly, and even so the only persistent symptom I've had is my fatigue. the rest, if any, I've gotten really used to. i just got prescribed Zoloft for depression and mild anxiety (25mg). My doctor says it really shouldn't cause many side effects or flare ups and was really reassuring about the whole thing, but I just can't stop worrying that something bad might happen. I'm going to start it this weekend and try and push through any side effects that may show up, but to anyone whos taking Zoloft with somewhat mild POTS, what should I expect?? I can deal with a little bit of a flare up for a week or two if its something that will go away with time.