Thanks for asking.
Based on your query, my opinion is as follows.
1. No it is not normal.
2. It appears secondary to antibiotics. The broad spectrum antibiotics used to avoid any infections, could have damaged the normal bacterial flora of gut.
3. Take probiotics or yoghurt to improve gut flora
. It should improve. Not to worry. Fat absorption may be a problem, however, it will slowly imporve.
Hope it helps.
Any further queries, happy to help again.