It sounds like you are experiencing die-off symptoms. Typically when you kill candida you feel worse before you feel better. There are ways to prevent die-off though, but it typically involves spending money. We have some posts about it on the sticky post at the top.
An alternative to eating veggies would be to juice them and drink that for a period of time.
Hydrochloric acid (HCL) is another supplement along with digestive bitters than can aid digestion. Theres a ton of supplements that can aid digestion, it just costs a bit of money.