It's open enrollment and if you get your health insurance through an Affordable Care Act plan, next year's premiums may shock you. I'm Sharon Eper, senior personal finance correspondent at CNBC and the author of the Money 101 newsletter. Imagine paying 26% more for health insurance next year.That's how much insurers premiums are expected to increase for ACA plans. But you could pay a lot more if enhanced tax subsidies are not extended beyond December 31st. your cost for coverage could double.So, here are th ...