Lot of burps, gas and motions. Help.

I had severe diarrhoea during my delivery in July 2017. They said it's due to bacterial infection. For 2 months I was quite sensitive and had motions , vomiting once in a while. I was ok after that. It's been 5 months now. But since 10 days back I ate dough fermented with active yeast at home. That night I had severe burps ..heart burn and continuous motions. I took lomotil to stop motions. But heart burn and burps continued. Went to doctor who gave Rantac injection and I was fine. Doctor suggested to take food on time and no spicy. Yesterday I had proper meals on time. Had home made pulav and chapati idli in the night. Since morning I feel lot of burps , feel like vomiting and had motions. Don't know what's happening with me. Should I consult any specialist. I want to know why I became so sensitive in taking the foods. Before pregnancy I was good ...rarely had a gut problem. I just have 1 month in joining back my office and I want to be cured of this. Please help.