nope size 14 is perfectly fine, atleast I hope so cos thats what I am at the mo lol
I do know what you mean though, even when I was thinner there were times when I felt fat and was actually border line anorexic for a while, but at the end of the day you need to be patient and as the others have said, 9 months on, 9 months off!
You may be craving junk because you have low energy, which is hardly surprising having such a new baby, but now is the time to decide not to get into bad habits that could spiral out of control and lead to monsters such as comfort eating, bullemia etc.
Dont be afraid to mention how you feel to your HV, she may be able to recomend ways to increase your energy levels in a healthy natural way
All the best hun xxx