Hi. I started zoloft 2 days ago. The first night I took 50 mg as directed and had EXTREME insomnia, panic attacks, and felt like I would vomit. Last night, I cut the pill and took 12.5 mg instead. Still had some insomnia, mild nausea, but still a ton of anxiety to the point where I had to leave work. (Heart rate was 100-115 and was having PVCs). Should I continue or stop taking zoloft?