Why am I not hungry!?

So I'm currently pregnant with my second, 30+2 weeks. With my first I had an uncontrollable hunger, was always feeling hungry even up to the end of the pregnancy. Also had lots of cravings for milk and cheese, and would have a whole glass of milkshake every night.

This time though I'm worried as things are so different. I have had a couple of weeks during my second trimester where I had that hunger but that was it. I have had no food cravings at all. And now this past couple of weeks food does not interest me. It's like I'm not really that hungry, I don't really fancy anything and when I do make myself eat, just trying to force it down for babies sake, I just feel sick and really don't enjoy it.

Is anyone else having the same problem??