Low-Lying Position

I'm currently 18W4D and I'm a bit worried for my babies current position. Based on my last and ultrasound t'was in May and check up on June 18, low Lying Position pa rin si Baby. Everyday na akong naglalagay ng unan sa balakang tuwing matutulog pero still my baby's kicks and Hiccups e sa may bandang puson ko pa din nararamdaman and it's my babies location based on my check up recently. Active naman si baby pero nangangamba pa din ako since sabi ng Midwife if di magbago location ni Baby it might cause miscarriage kahit mag-5 months na tummy ko. First time mommmy here. I hope someone can advise me on what to do. Thanks Momshies