when we first decided to get pregnant I was pregnant about a month after getting my IUD taken out

when we first decided to get pregnant I was pregnant about a month after getting my IUD taken out. At 16 weeks we want in for a routine check up only to find out there was no heartbeat and that the fluid sack wasn't full. I was checked into the Birthing center and had to deliver the baby. they said it looked like it had passed a week or so earlier. I had no sign of a miscarriage except a small amount of spotting. Now fast forward a year and a half and we are still trying to get pregnant. It's been a tough road so far, especially since there is really no outstanding reason why we can't get pregnant.