2006 Pontiac Pursuit Losing power while driving.

Hi there, i've been having problems with my pursuit the past two days. When i'm driving at low speeds, or stopped, the car just loses complete power, and i have to restart it to get it moving again. Yesterday i had to turn it off and on 10 times before it would move more then 4 inches. I had the ignition switch replaced last year due to a recall, and around this time last year it did it twice. I've only had the car a year and it seemed to be in good condition when i got it. i'm not sure if this is the ignition switch messing up again, or if the fuel pump is clogged or something? maybe its the cold weather since it happened last winter too? Hope you can help!