Talk to Gynecologist on Gynea And Stomach Issue

AoA I m 14 weeks and 5 days pregnant i had my last check up on 28th may and everything was fine Alhumdulillah. I told my doctor about heartburn and acidity she gave me syrup ulsanic. Now the issue is heartburn and acidity is gone but i burp alot after every meal. A pressure start building up at the back of head resulting in nausea and vomit as soon as i eat something. This is not morning sickness bcz i faced different symptoms of morning sickness in my first trimester. In first trimester i faced low bp and headaches but after eating headaches were cured. I have no history of i want to know what is the issue is this normal or should i rush to emergency. Sometimes syrup helps in headaches and then no nausea and vomit. In worst scanerio i take envepe to stop vomit recommended by my doctor. Is my pressure building headaches are related to stomach indigestion or acidity? bcz i only feel them when i eat something without taking syrup. Detailed answer will help me ne