TTC at 41 following a neonatal loss and mmc

Hi all I've just downloaded this app as it was recommended by a few people. I'm 41 my husband is 45. I've had 3 children to my first marriage. My husband and I have our beautiful little girl who is 3 on Monday ☺ in November 2015 we had our beautiful little boy 💙 but sadly lost him at 3 days old. May 2016 I found out I was pregnant with our special rainbow baby but sadly had a mmc at 12 weeks. Had medical management twicw July 28th and 29th failed both times had to have D&C August 2nd. We've been ttc since September last year. Feel it's never going to happen 😔