Salt is another one to pay attention to. I know for me it can aggravate bloating and all the discomfort that comes with that.

Barring any serious medical issues, though, I doubt you'll find a magic bullet. There's a lot of information out there about nutrition and foods to avoid or foods to make sure you have in your diet -- I don't know how good that information is but some of it may be worth trying out.

You might also look into some of the herbal formulations that are out there. I took one for a while and had significant relief from my physical symptoms, which in turn improved my mood. Probably not for everyone, but I found it effective.

If your cycles are fairly regular, to the extent you are able you might try to manage your stress according to how you expect to feel throughout your cycle. There are weeks when you can take on more and weeks when it might be wise to dial back. Skierchickie is right, just recognizing it for what it is can be very helpful, then you can make a plan for how to deal with it. Don't let your symptoms take you by surprise every month!

I'm glad you are planning to talk to your doc about this.