Could be a number of things...since you mention the two sides of your abdomen but not precisely where you are prodding and with no mention of a fever...one possible answer is hernias.
Since this is merely a SWAG (Scientific Wild Assed Guess) you may want to go see a physician who could actually diagnose the problem
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it is possibly apendicitis
Go to the doctor, Or wait to see if it goes away.(I recommend going to the doctor).
my abdomen is hurts me cbecause i ate so much
You are in pain with the whooping cough because your parents did not get you vaccinated.
maybe your getting your period.
Assuming you took the cough medicine due to having a cough, it means you are sick.
It isn't. Perhaps you have an allergy.
If it's what i have it's strep thought (tonsillitis) go talk to a doctor.
you may be too tense. try and relax, even when you cough hard.
If it hurts more with bending and twisting, it is most likely muscle-related. It it hurts when someone pushes on your abdomen, but not when you bend or twist, then it is more apt to be internal. There are hernias that can cause a bulging in the area you indicate, but I doubt that a hernia in the front-side of your abdomen would be a cause of back pain, unless you have more than one thing going on... If this continues, or begins to get worse, then I strongly suggest you be seen by your family doctor for possible Xrays, etc and surgical referral...
Think, talk, look at light, laugh, bend over, cough
it is when you ask someone if the want a hurts doughnut and then punch them in the arm and say hurts don't it.