Is my golf swing considered bad?

I am a lefty golfer and I'm sort of a beginner to the sport. I've been using mostly a 7 iron and my shots haven't been going as far as I wanted (roughly 50 yards). I tried this new trick the other day that helps me, but would be considered very bad by any professional golfer. What I do is that I lay the club head facing the ground, and then I take the club back and swing it. My go about 150-200 yards now. What I want to know is if I should continue using my swing (and being laughed at by my friends) or drop the swing and try to learn the correct method?