Melly so sorry that you failed the 1-hour glucose test! I know here they recently changed regulations and lowered the threshold. It ended up screwing people over who normally "passed" and had no issues, but I'm not sure what the threshold is in CA.
A skilled care provider can definitely tell the baby's position from the outside! I would hope OBs are trained in that. Here's how midwives do it. They feel down low for a part and wiggle it a bit. If the baby's whole body wiggles with it, then the midwife is feeling the butt, but if only the part wiggles, then it's the head. That's how my midwife determined that my baby was breech at my last appointment. The position where the heartbeat is found can also help. You can also try to feel where you're feeling big kicks and little movements. If you're feeling big kicks up towards your ribs and smaller, hand-like movements down low, then baby is head down! Spinning babies has a belly mapping guide here: https://spinningbabies.com/baby-positions/belly-mapping