If you've done a double-take at the gas pump, you're not alone. Gas prices are going up again.

The Lundberg Survey found the average price of a gallon of gas has jumped nearly $0.25 in two weeks. The average price for a gallon of regular is no $3.59.

It's the biggest two-week jump in nearly two years. 

Lundberg blames a rise in wholesale prices for the jump.