Without knowing what you have been eating, it is had to tell why you have these cravings. Some off the cuff ideas are:
1. Are you eating enough? Sometimes cravings are cravings, sometimes cravings happen because you are actually hungry.
2. Protein and fiber rich foods tend to be more filling, so if you have a choice, go for whole grains instead of white, refined products.
3. At least for me, I do experience a few days of sugar craving during that TOM. I allow myself a piece or two of chocolate but no more.
4. Do you dislike ALL vegetables or just some? There is no need to force yourself to eat things you dislike if there are alternatives. Some people find raw vegetables are easier to handle.
Glad you are meeting with a dietitian soon!
One thing that may be helpful is in the next 5 days, log everything you eat, how you feel (both physically and mentally), and bring that record along to your meeting. It will make it easier for her to give you recommendations if she knows where the "starting point" is.
Take care of yourself.