I panicked so much thinking my nausea would never end and I couldn't eat anything. But it suddenly vanished around week 13, so don't worry, it is completely normal.
Most women see their nausea clear up by the 12th to 14th week. If it extends beyond that, just speak to your gynecologist for safe antacids or suggestions.
Usually it reduces after the first trimester, but please consult your doctor if it is very severe. I had some complications where I couldn't keep food down and needed medical support.