Ovulation After Miscarriage

Hi! I had a miscarriage in early October; it appeared to be a blighted ovum. I got my period a couple of weeks ago, and pre-pregnancy I was fortunate that my cycle was regular and my periods were uneventful, light to medium bleeding for four days. I got my period a couple of weeks ago, and it was the lightest it’s ever been and lasted two days. I realize it my still be out of whack because of the miscarriage, but now I’m supposedly in my fertile window and my ovulation tests are coming back at “low fertility”. Not sure what to do here other than take an ovulation test everyday. I’m 38 and my husband and I are eager to have a baby.