2008 Chrysler Town and Country Integrated Ignition Switch

My problem just started on Sunday, May 25, 2014. I had stopped at a location, turned my van off to go inside and make my purchases. When I returned my van wouldn't start (no power to windows, locks & no dash lights except mileage). After a couple tries I turned my key in the opposite direction (never affected the way the van started before), the van started. Later that day, same thing. I didn't try to start it the following day (Memorial Day), but on Tuesday I tried and nothing. No dash lights, no power to windows or locks. That evening it started right up, twice, then the third time, nothing. It has been this way since. I've ordered a new key fob with chip, etc and will receive it tomorrow (Tues 6/3/2014). Could there be any other reason this problem has suddenly popped up and if so, what to do? I live on S.S. And have a very limited amount of funds, so please go easy. Thanks in advance for your advice and assistance.