I think I do have IBS, although I never went for check-up. Due to a surgery done to correct bowel movement at toddler. I've been having IBS symptom since then. But that was all history. Been suffering IBS for more than 10 years since birth!!!! Yes, I'm a little shy to tell but this is just sharing.

During my primary was worst:
1. Occasionally vomit. Else, having nausea constantly.
2. Bad constipation (4-5 days).
3. Bad appetite
4. Occasionally diarrhoea (It is very bad especially when I already constipate for 5 days)
5. Feel full all the time.
6. NEVER eat outside.
7. Psychologically affected such as moody and low confident.

My parents think its normal kids having no appetite but as I reach my puberty, I believe it even affect my hormone. However, things changed lately and got better. Not probiotic though, its spirulina does wonder!