I am 41 years old trying to conceive. I've had three miscarriage this year. I eat healthy, watch my weight & exercise lightly.

I pray to be blessed with a bundle of joy. I cry myself to sleep at night wondering what am doing wrong. Yesterday I had a biopsy, my doctor could not get a good sample, she tried three times. On the fourth time my husband told them to stop. The pain was escrutiating, but I would do it over again if it will help me get pregnant.

Does anyone have advise for me? I've been taking prenatal pills, biotin, Vitamin D.

Please advise, I am desperate.