I received a call from this number several times

Spam they said I won a 70% off trip

I accidentally said "yes I can hear you!" Now don't know what to do!

Don't make a mountain out of a mole hill. Keep any eye on things (accounts, statements...etc). If you feel the need to change something (like account numbers), I guess you'll do what you think you need to. Have you heard of any confirmed cases of this in the news? Give your BBB a call and see what they say. A little paranoia isn't a bad thing, but don't go over board. Think it all the way through and be realistic and rational. Protect yourself within reason.

I noticed that many people are being called by this number. I didn't pick it up, but I blocked the caller. The caller lives in Bakersfield, California.