Can anyone help tie up all these things I’ve experienced ?

Felt very uncomfortable on and off the last 3-4 days, pretty sure I’ve had Braxton Hicks , random hot flushes that last ages and generally just don’t feel myself . Had an ultrasound at 28 weeks and was told LO one was head down . Saw midwife yesterday at 31.5 weeks and she is still head down ? Just worries that she’s going to enter the world really early 😩