Bleeding twice a month after abortion.

I am a 28 year old newly married woman. I have been bleeding twice a month, after every 15 days since past two months. I got my pregnancy terminated under the medical guidance of my gynecologist. The termination was through medicines. My last normal period was on 1 April. I came to know about my pregnancy on 10th May and got the termination process initiated by 13th May. After having post abortion bleeding which lasted till 17th May, I bled again from 30th May to 1st June, and a few days later again from 12th June to 15th June. I took I-pill on 23rd June due to unprotected intercourse a day before. And I have started to bleed again today. Is this normal to have irregular cycle after medical abortion? What else to expect ?