Airbag service light on

Need help guys. I am average woman who just drives the car, get oil changes, etc unless something occurs. I have 2007 malibu and have never had any major problems what so ever. Have little over 49,000 miles. Last week air bag light will come on and off. This happen maybe about 3-4 times for a few seconds 2 days last week. Today it occured about 6-7 times. I am scared the bag is going to deplore why driving and I crash! Car has never been in accident and airbags never deplored.

My question is, is it safe to drive it until I can get to a repair shop saturday when I am off work? What could be possibly the problem? Will it be costly? Should I go to the dealer or repair shop like Firestone where I get oil changes, tires, and inspections. They do major repairs I have been told.

Thanks for any help guys.

Thanks so much for the reply. I took it to the dealer a few earlier today and it was the sensor. The repair was only $113, so I am glad didnt have to pay a huge amount.