Can I Switch off Emergency Only Medicaid?

I signed up for Obama care and was told I might be eligible for Medicaid so on dec 15th 2014. I put in my Medicaid app. just got a letter yesterday 2-17-2015 that I was approved for EMERGECY ONLY Medicaid. So my question is, do I need to sign up at market place to get my blue cross blue shield back ? I don’t have the money to pay for all this stuff myself Dr. office . meds I am laid off and only get $133 a week.