No appetite! ?

I have absolutely no appetite whatsoever and it's horrible, I have no desire to eat anything. 
I have eaten three plain crackers and a bit of potato today, it's a wee bit worrying aswell, if I'm not eating the baby is not eating ? last week I was sick for a whole week and this week it's been no appetite, I can't wait to overcome this part.
 Anyone else out there going through the same thing?