Generally there's not much you can do to fix something like that. Once it's printed to the track it's hard to remove it.

Playing with EQ may help.... also putting the vocal back further in the mix so it's not so "upfront" may help.

A better option would be to get someone else to record it for you again.

I have tried over the years to "fix" bad recordings and it's really extremely difficult to do. To fix it would require replacing the bad data with good.... essentially creating it out of thin air. For every good action, there would be an equal and opposite reaction. While you might gain on one area, usually something else would happen.....

One last thing you can try..... do you have Melodyne Editor? It is probably the most amazing software available at a reasonable cost to attempt to fix a bad vocal track. It is good, but there are things it can't fix. I've used it to fix all sorts of things in vocal tracks but never tried to cure a cold with it.

Here is a link to the fully functional 30 day trial version. http://www.celemony.com/cms/index.php?id=demos&L=1%25D0%25A0%25D0%2586%25D0%25A0%25E2%2580%259A%25D0%25A1%25D1%2599%253FL%253D1%25D0%25A0%25D0%2586%25D0%25A0%25E2%2580%259A%25D0%25A1%25D1%2599

Get it and try it. Nothing to lose.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.