Hi, I have it lower backache or lower tummy pain at the start of 3rd trim. After meal, I can’t even walk longer than maybe around 15mins. Doctor say is caused baby get heavier. So gynae advice me to take a rest when I in pain or aching. If u do have swollen feet like me at the later stage, soak your feet in warm water. For me, I add in epsom salt to the water, I got it online from shopee.