From your history I think you are having an allergic response
to dust or Asthma.
For these symptoms I would start my patients with antihistamines and steroid
drugs. And will slowly titrate to lower doses.
may itself aggrevate the allergic response and it can very well be causing the gastritis
I'd advise you to stop serratiopeptidase and continue montecip.
And follow up is required to change the dose and medications hence try to keep the appointments with your internist.