Hi Guys

First post here, I received the same email and stupidly clicked on the link without thinking and entered my private key to myetherwallet. I closed the link after reading this thread, what does this mean. Can I change my private key? I only have a few Golem and OMG in myetherwallet, but I'm worried about my timemint and day tokens (Only purchased 1 ether worth) during the ICO. Anyone help?