Hi,
   I understand your concern.
 *  The 
pregnancy vomiting is due to  raised levels of pregnancy hormones in mother's blood. The severity & duration of vomiting depends on ability of mother to stand the raised hormone & time taken by her to adjust with it.
 So vomiting changes from person to person.
   In your case, you are 6 months pregnant & still vomitingYou are also taking antibiotics for your ear problem, which can cause raised acidity & vomiting.
  * I would suggest for Pyridoxin hydrochloride preparation ( Doxinate/ pregnidoxine) to control pregnancy vomiting        
Proton pump inhibitor like Omaprazole/ 
Ranitidine along with antibiotic/ Lacto bacillus & B complex along with antibiotics 
 * Consult your doctor for physical examination & specific medication.
 * self care- Take small & multiple servings of non irritant food providing  good neutrition , have walking exercise regularly, 
   - Avoid physical & psychological 
stress./ Be positive.  
  Thanks.