2001 Chevy Blazer clogged fuel injector?

I had the intake manifold gasket replaced & the spark plugs changed a couple of weeks ago. Last week the check engine light came back on so I took it back & he said the radiator was leaking from the seam on the bottom. I didnt have him do anything to it & when I picked it up the engine was running really rough & the check engine light started blinking, which it had never done before. I turned right around & took it back & he said he thought I had a fuel injector clogged or going bad in #5. I have spent all the money I had on the repair he just did. Is there anything I can do fairly cheap to fix this & if not then will it hurt anything to keep driving it for a few months while I save up. I have ran one bottle of injector cleaner through the gas.