Welcome to the forum.
You have hypersensitivity
to smell also called hyperoosmia. It can be due to genetic effects but more commonly environmental. Try to move away from strong smells/odorants to stay comfortable.
The olfactory acuity gets back to normal after a period of time, if you still have problems you should see a doc you may require medicines.
The loss of appetite may or may not be related to hyperosmia
. It depends upon the severity of hyperosmia you are suffering from. Headache, dizzy spells, backache
, loss of appetite is due to stress
, mood disorders or some developing viral infection.
It can be due to stress. Take rest, relax and watch if you feel better and your symptoms should disappear . If they do not you need to see a clinician and get examined and get blood tests done. You need antibiotics.
You can take analgesics, vitamin supplements. Use of pain relieving sprays and oitment can give you temporary relief. Take care.