When I was expecting after our long IVF journey, I was very careful with everything. Kokum sherbet in small amounts is wonderful for morning sickness, but do consult your team if you have any doubts.
When I had terrible heartburn, the dietician at the hospital suggested home-made kokum juice without too much sugar. Always better to double-check with your hospital's nutrition desk during your next scan visit.
I felt so much relief from nausea after drinking kokum drink during my first trimester. It was the only thing that made my mouth taste better when I couldn't eat anything else.
Kokum is excellent for natural relief from acidity and vomiting. But remember, if your vomiting is very heavy and you can't keep any liquids down, please don't rely only on kokum and call your doctor immediately.