Hello and welcome to e health forum.
Intake of antibiotics can cause reduced intestinal good bacteria and overgrowth of pathogenic bacteria. This can sometimes cause diarrhea and dysentery like symptoms.
Presence of fever, persistent diarrhea, fatigue, nausea, vomiting are some important symptoms you must look for, and consult your doctor at the earliest.
Usually in mild cases, the condition subsides on its own. providing a good nutrition and probiotic supplements might be helpful to resolve the condition.
But, other conditions like inflammatory bowel disease, lactose intolerance, malabsorption syndromes, polyps, diverticulums, etc need to be ruled out. Hence a stool examination and a physical examination by your doctor might be essential.
I hope this helps.