@annamostyn_,
Binging days happen, especially to those who are relatively new to not eating animal products. Let's say for the first three or four years. Even after this, they can happen occasionally.
There are three addictive things food producers add to increase their sales: sugar, fat, and salt. Even though something you buy in a box may be vegan, most likely all three of these are added. For instance, vegan burger substitutes are generally 35-40% fat. I don't know about the sugar and salt. Check out the microwave meals, and you will find the same thing.
Try to work towards eating foods in their natural state. For instance, instead of a frozen meal heated up in the microwave, make some rice and frozen or fresh vegetables. If you eat foods in their natural state, eventually, the other cravings will at least be reduced.
You can stifle your urge for sugar by eating more fruits. I have little cups that I fill with grapes or some other berry and put them at the front of a shelf in the refrigerator. I also have mandarin oranges. I put them in a box instead of leaving them in the bag. Strangely, making them more convenient to grab makes it more likely that I will.
I always have a pot of grated vegetables in the refrigerator. I use an inexpensive food processor to grate about nine different types. I eat about a pound of vegetables a day because it's convenient to add them to most every meal.
There is a concept some call a firebreak. If you have a craving, give into it in a small way and then move on without any guilt feelings. My weakness is potato chips. I'll have a small bowl and then be done.
Don't be so sure it's IBS flaring up. People who mostly refrain from eating animal products, added oils, etc., often have intestinal distress when they stray.
Keep up the good work!
