Hi y'all!

I've been high carb vegan for about a year and a half now, and I was vegetarian for 6 years prior. I have always had digestion problems and I came to this lifestyle seeking relief. At first things seemed better once I cut out eggs (I've never been able to eat much dairy). Now, for at least the past 4 months my stomach is in constant pain. Every time I eat I will have to find a bathroom within 20 minutes, and my intestines will start to cramp up terribly. I also struggle with yeast problems, and no matter how much I limit my fat intake, these problems do not go away. I'm at a loss, I know carbs are the way to go, but it seems the more sugar I eat, the worse I feel. I've stuck with it for a year and a half, and I could never go back to the cruelty of eggs and dairy but I'm in so much pain all of the time and I never had these problems before I went high carb low fat. Help! Please.