Is there virus scanning software for windows mobile?

I think that I installed a virus onto my cell phone. I downloaded a game on the internet, put it on an sd card then installed it on the phone. as soon as I hit install all the icons dissappeared. I haven't been able to find these programs running on the phone, but my last bill had 80 dollars worth of internet charges that I didn't use. The phone is a samsung blackjack 2. Please help!!!