Late bfp?

Tiffany

I'm on cd 47.... what is the latest u got a bfp? My sister didn't get one until 8 weeks! According to a <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">due date calculator</a> I would be 6w! I have an appointment with a reproductive endocrinologist in three weeks to see why I have had a few mc. Idk if I can wait that long! This the latest my period has ever been! The longest cycle was 32! I need opinions ladies!!!!