I don't think there are any tests to diagnose the risk of M/C. But if you do M/C again you can ask for test to be carried out on bub (let hope that won't be the case for any woman here).
These days with HPT we know very early on when we end up PG, 25+ years ago a woman might just think AF was late if they had an early M/C. You would be well passed the 12 week mark if you waited till Dec to test if you fell PG this cycle. I think you might know before you test, missed AF sore BB etc.... I'm armed with my HPT, but I plan to play it by ear.