I had very bad morning sickness during my 1st trimester too. Besides wanting to vomit whenever I brushed my teeth, I also felt nausea throughout the day. I will have sudden urge to vomit at very random timing.
During that period, I have to bring sour plum wherever I go.
It helped me to relieve the nausea feeling by eating sour taste foods such as sour plum, orange, lemon juice.
Read more