How much chocolate can I have when pregnant?

Lately I have been craving it so bad. I am 36 weeks pregnant and am unsure how much I am supposed to have. My friend is pregnant and drinks pepsi all the time. But I am more cautious. I have a pack of fun sized hershey bars milk chocolate am I fine to eat 2 a day? I don't have anything else with caffeine in it. No soda or coffee ever.