Nausea and migraines

Hey mummies to be, am a first time mum and have had nausea and daily vomiting, sometimes more than once a day. Tried to keep away from smell triggers but my daily commute to work requires me to walk past some food hawkers. Wearing a mask constantly. Have been having this vomiting and migraines since week 7 and even though it should get better in trimester 2, am still getting vomiting episodes at week 16. Migraines are more frequent too. Any other mummies still experiencing nausea and migraines in tri 2? Drinking icy cold water helps but will drinking it all the time risk my bb having asthma?