I was driving my car today when I was stopped at a red light, when the light turned green I stepped on the gas, it started to go and then it stalled. After sitting for a few minutes it started up again but everytime after that I was stopped at a red light the minute it turned green and I stepped on the gas it was very sluggish and felt like it was about to stall. Do you know what could be wrong with my car. I am afraid to drive it home now.