Baby movement patterns?

I had an appointment with my midwife today at 19 weeks + 6 days.

She said by this time, I should be starting to notice a pattern in my baby’s movements. But to be honest, I don’t see a pattern at all. I barely even feel the movements. 🤷🏼‍♀️

I mainly feel the baby move at night when I lay down, so would that be a pattern?

When did everyone start to feel definitive movements and a pattern?

Also the midwife couldn’t find a heartbeat with the Doppler today but said it was most likely due to my anterior placenta and not to worrry. I was pretty scared at first but I keep reading that a Doppler usually can’t find a heartbeat at this gestation. And I THINK I’ve felt my baby move since this morning, so trying not to stress.