Hello there. I can understand your concern. So your periods had stopped and for them to start you took a medicine. Now that it has worked you aren't happy and think it's a side effect of the medicine?  Isn't this what you wanted? May I take the opportunity to inform that it's the effect of the drug. Talk to your gynaecologist in person for further evaluation and and management. Best regards. Dr. Anil Kumar Jain. Bangalore.