Thank you for your query at DoctorSpring.com.
I am Dr.R.K and I am pleased to assist you.
As per your statement all your symptoms started one week ago.
Abdominal pain, altered bowel habits and fever of a short duration most probably are due to a gut infection. You probably have infectious colitis. A stool test may be done for confirmation.
Take a BRAT diet (Banana, Rice and Apple sauce Toast). Drink enough fluids to remain well hydrated. Include yoghurt in your diet.
If the stool test confirms infection you may have to take a course of anti-microbials in consult with your doctor.
I hope that answers your question.
Let me know if I can assist you further.