Welcome to HCM.
Based on the information provided, there are two possibilities.
1. you seem to be suffering from GERD ( gastro esophageal reflux disease
) which often causes vomiting, Halitosis( foul breath).
Using medicnes like omeprazole
along with domperidone
should help you ( are available as a combination in the market under the brand names Omez D , Pan D..etc)
Use the above mentioned medicines for a period of one week(should be taken one tab or cap per day one hour before breakfast). Avoid spicy diet.
2.The other possibility is pregnancy
. vomitings, altered perception of smell often happens during early pregnancy.
So, firstly get yourself tested for pregnancy(urine pregnancy test). If that turns out negative , then you can use the medicines prescribed above.
Hope you got the information you were looking for.
Dr Sai Rajesh