sick and no appetite?

xoxCait

I'm 13 weeks today... yay!

I have been sick with a flu bug this week and my appetite has been pretty well gone. I haven't eaten much and it worries me that its not because of the flu but something with the pregnancy. Has anyone else experienced this in the early 2nd trimester?  I also don't have much other symptoms so it's hard for me to tell if everything is okay.