Hi welcome to the health care magic 
Diarrhea since month is not normal 
Cause for it has to be searched for... 
Investigation needed with stool culture and USG examination... 
If culture positive for parasites or Bacteria than accordingly treated with suitable medication  .. 
If non infective diarrhea than 
diverticulitis,  excess stress,  functional bowel problem,  
Celiac disease like cause has to be searched for 
If needed 
colonoscopy like investigation might done for further work up 
According to cause further specific treatment given 
Meanwhile maintain hydration with lots of water 
Consult physician for examination first 
Take care