I know it can be very frustating when you are trying to find answers from a Doctor. Sometimes they can make us feel very ignorant. I dont know why. Some doctors are wonderful and some are just plain mean and arrogant. I have been treated by both types.
NO doctor has the right to belittle you or mistreat you. One of the best things this country has to offer is its medical treatments and options, take advantage of that now. I know you do not want to go to a doctor, but I dont think we can tell you what is happening to your body and you may need medical attention.
If its possible I think you should find a new doctor or go to the ER and hold your head up and speak your mind.
I wish you the best and I hope you feel better soon, miscarriage is devastating, I have had 3 and I know how you feel.
Lisa
I have no idea what it would be, but if you had sex at the end of March and got pregnant the embryo and sac certainly wouldn't be 5 inches long. That's not what it was.