Is it normal to not feel hungry?

I have both IBS and gastric issues - I tried to avoid eating things that could trigger any of it, but man spicy food is just my go-to lol.

But, for the past few months, I've noticed that I tend to not get that hungry, cause I'm so tired of going to the toilet multiple times and the stomach pain is just not it. It makes a lot of loud sounds everyday, too..

It reaches to the point that I genuinely have no energy to function well in my daily life cause refusal to eat -> but stomach pain if eat -> then no.2 happens often.

Do I need to change my diet or eat any extra vitamins? :/

Thanks in advance everyone.