Flaked oats

Hi every one! I'm a newbie. Just started extract w/ grains brewing 6 months ago, and not doin' too bad. Anyway, to make a long story short, 2 daus ago i think i made a booboo! After all i read, i made the mistake of mashing flaked oats w/out any other grains, because i wanted to get more head on my brew. So, i still went ahead and added my 6 pounds of malt extract and the rest of my ingredients. What can happen, or not happen? Will my beer be ruined? Is there anything that can be done to save my brew day?

No problem, really unless you used too much flaked oats.  Half pound should be fine.  Without grains with enzymes, you just won't convert any of the oat starches to sugars, so your gravity will be a little lower.