Welcome to HCM.
Your weight loss
is most probably because of your decreased intake of food. Food allergies can get very worrisome as you have to be very careful in choosing what to eat. I suggest you get the allergy
specialist consult as soon as possible and get a patch test
done to find the allergens you are allergic to. That will help you decide very clearly which foods you have to avoid. You can take Tab Emcet half an hour before food for the nausea