I lost my 10 weeks 3 days pregnancy baby

Patient: I lost my 10 weeks 3 days pregnancy baby yesterday,till the last check up all reports are perfect, each and every tests results were normal with healthy pregnancy,but today i dont have my beloved baby, i cant tolerate this, im shocked and mentally disturbed lot, d&c was completed yesterday. Why this happened,what was happened? I dont know how to imagine and from where to start to re search the reason,please help me.

Doctor: