Hello and welcome to HCM.
Such pain described can occur due to direct effects of toxic fumes you inhaled,but it's been a week since you were exposed.After a week,the resulting
pulmonary oedema may cause such pain but there not be also other symptoms present like
shortness of breath,cough,so chances are less likely.
The pain in your chest can be due to
pleuritis or gastroesophageal reflux.
If I were your treating doctor,I would recommend,
-tablet
acetaminophen twice a day for 3 days with cap omez once in morning.Avoid anti inflammatory drugs like
ibuprofen or naproxen.
- Investigations like Chest Xray ,blood haemogram for diagnosis.
-If you have other symptoms like breathlessness,fever,decreased appetite,cough,report immediately to physician.
Hope this information helps.
Thanks and regards.