When I was filling gas in my car and I was getting to where it was about to be full, fluid started to leak like a faucet underneath my rear drivers side underneath the car. I was unable to see clearly as it was dark. Any ideas? It didn't smell of just gasoline. When I started driving my car it was starting to almost stall, and started to have the transmission having trouble shifting gears. my battery light and the one just under it came on for a split second while driving on the highway and then stopped. I have no idea what it is...my car almost stalled while driving.