Hi,
As per your clinical description it seems that you are having diarrhea due to some infection, and the frequency you have had might already have made you very weak. In this case the first concern is to assess and treat the state of your 
dehydration. So if your tongue is dry, blood pressure is low and you are passing less urine than usual then you should immediately visit any nearby hospital for intravenous fluid 
resuscitation and further management. 
For the time being, if the symptoms are less severe i would advice you the following:
1. Do not take plain water (that would cause more 
electrolyte imbalance in your body in this condition), instead take plenty of ORS (1 sachet in 1 litre of water each), frequent sips.
2. Use some anti secretory agents like 
Racecadotril (Tab Redotil 100mg) twice daily for 3 days.
3. Some combination antimicrobials like Ofloxacin and 
Ornidazole (Tab O2) twice daily for 5 days. Try to have less spicy normal diet. 
Hope I have answered your query. Let me know if I can assist you further.
Get well soon. 
Regards,
Dr. Md Firoz Mullick