Thanks for the query.
Oral contraceptive pills
can cause side effects like menstrual irregularities, pain abdomen, bloating
sensation of the abdomen, breast tenderness etc.
So what you are experiencing could be side effect of the pills.
Usually these symptoms will subside soon without need of any medication.
And also possibly you can get periods soon. If you do not get periods also you have to continue the pills as usual.
But if the symptoms persist better to consult your doctor once and think about changing the pills.