Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
Menstrual irregularities, excessive bleeding, amenorrhoea are very common side effects. Incidence of amenorrhoea increases with increase in the duration of it's use. If one or more should occur, they often settle down over a couple of months or so.
Return of fertility
can take upto 6 -30 month after discontinuation.
Even it can cause irregular and unpredictable bleeding or spotting, an increase or decrease in menstrual bleeding, or no bleeding at all.
Other possible side effects include weight gain, headaches
, abdominal discomfort, dizziness
and weakness or fatigue.
I think it might be side effect of it, it will resolve. For your abdomen pain you can try over the counter antispasmodic medication
I advice you to wait and watch for week, if after week also it persists i advice you to see the prescribing doctor.
Yet again, I do hope that you have found something helpful and I will be glad to answer any further query.