Scared to try again

I had a MMC back in April and had a D&C May 6th I became pregnant again Early October and that ended up being a blighted ovum. So now I’m deathly afraid of having another MMC/blight ovum

I have two healthy girls and I’m so dumbfounded as to how/why this happened twice after them. I just turned 30 and have no underlying health conditions. I feel like a failure I don’t know why this happened and if I should even try again.

Any success stories after two losses/pregnancy failures like mine?