Welcome to the forum. You are being treated for your symptoms. Typhoid fever
generally presents with a step-ladder form of fever for 15 or more days. You have these symptoms. You are being treated for it. This is caused by S. typhi and spreads due to the contaminated food ingested. It spreads into the intestine and blood and causes the symptoms.
You should eat home made food that is boiled or blanched as eating oily spicy or fast food may result in complications like intestinal perforation
Take the medicines prescribed and keep yourself well hydrated. If you feel weak you may require IV fluids. You should be at rest to recover faster.
Enjoy good health, take care.