You are probably suffering from gastroenteritis
. You should consult a physician. You have protozoal infection
due to which you are passing loose stools, the cramps are because of it and gastritis
. Take plenty of water, fluids and soups to keep yourself adequately hydrated. Avoid getting dehydrated else you may need IV fluids. After consultation with your GP you may take anti-protozoals/amebicides or the required medicines. You may have to get stool test
( R/E and C/S ) done. It is important for you to get examined clinically for tenderness or any other clinical findings.
You also have allergic rhinitis
, anti-allergics will be of help to you. Do not get anxious, take rest.