Does Zoloft cause nausea and vomiting?

Hi, Molly!
Side effects like nausea/vomiting may affect some people when first starting an antidepressant/anxiolytic but they usually appear within hours to days and resolve within days to a couple of weeks.
It would be unusual for them to appear this far into treatment. Have you increased your dosage recently? That could be a cause.
You should report this to your doctor for professional advice and to possibly rule out an underlying cause.
Best regards and I hope you're feeling better quickly.