Help! Help! Help! Gas Leak!

My car (95 Chevy Lumina) has been acting kinda funny lately... a few days ago it wouldn't start properly (it was shaking and sounded like a train... someone thought it might have been a loose spark plug... but they all checked out). After we added some fuel cleaner stuff, it seemed to clear up.

But now I have found a small gas (I think!) leak! I pulled out this morning and there was a puddle under the car back where the gas tank sits. After watching it for a while, I noticed a small drip (so it definitely is leaking).

I know ABSOLUTELY NOTHING about cars!!! Can anybody tell me how much it may cost (ballpark) to get either the lines patched or replaced? Might the tank be leaking? Is it safe to drive for half a day until i can get it to a garage?

go to parts store and buy a thing of seals all.Just put it on where gas is coming from.This stuff is awesome

Don't mess with a gas leak. Take it in and have it fixed.