Hello! i?m 20 years old and I had my first pregnancy that ended in miscarriage. About 4-5 days ago I was told that I was pregnant 4 weeks, next day I had a miscarriage. What could cause that? I don?t have any illness and I have regular periods, my weight is healthy. I also wanted to know when could I try again? Doctor said that my miscarriage is natural and everything will happen on its own.