pregnancy has me eating unhealthy :/

Macy
I don't know about you ladies but pregnancy has me eating very badly :(
I've been wanting a lot of fast food .granted it isn't a lot of fried stuff I'm wanting but I'll want like pasta from chilis or a meatball sub from firehouse and subway. 
Trying to lay off the sodas but I need one every now and then to keep away the headaches .
I'm worried my little one isn't getting the nutrients he or she needs :(
I hardly have an appetite but when I do eat I just don't want anything healthy.