D&C help

I'm 42 years old. I have had 5 kids with no complications. I had the mirena iud for 10 years. got remarried and wanted a child with my husband. This year I have had 3 miscarriages. one in January, Chemical pregnancy in February, and missed miscarriage in July with a D&C.; Not gotten pregnant since then.. what are your experiences with getting pregnant after a D&C;? Wondering what could be wrong that I'm not pregnant again. I track cycles, ovulation, bbt and everything is back to normal.