This has nothing to do with your career.
I had 3 miscarriages between the ages 32-34, also a well-established career, house, well currently a new one, cars, decent holidays etc. A decent lifestyle. You're not to be blamed for achieving this or for making sure you can provide for your child, this is to be applauded.
Miscarriages happen to everyone, at any age. Multiple miscarriages are far more common than you may now, because there's a massive taboo.
FWIW, I too took care of my body, still had 3 in a row, 2 of them were missed miscarriages too at the end of the first trimester which are very difficult to deal with. One was particularly traumatic physically and emotionally and I had to go to private counselling. I felt the same as you about pregnant women around me for a very long time. It's a grief reaction and it's normal.
I also felt the same (and still do) about the women who don't take care of their bodies and end up pregnant and having healthy children. Unfortunately, pregnancy is not a fair game, it's a lottery. The sooner you get out of your head that yoh can control the process, the better for you. Sorry to be blunt, but that's true - I felt trapped in trying to control something that is a random event, it may or may not be successful.
I had tests at the Recurrent Miscarriage Clinic, my husband was tested too. We're fine, healthy people - nothing came back wrong. And randomly, I am now 36+3 weeks pregnant with my son.
Do not link your career with something that is an unrelated event.
Take good care of yourself, don't give up and very best of luck to you 