I was in the hospital in January 3rd 2015, and returned three days later. I also have medical bills from the past two years. Will obamacare cover all of those?
ObamaCare plans only cover claims for covered benefits that occur while you are holding your policy. If you accrued these bills outside of the policy then they won't be covered. There are many local charities in most regions that help people out with unaffordable medical bills.
Also there is an exemption for folks who had unaffordable medical bills.