I’m 21w pregnant and have noticed when the room is quite I can hear a heart beat in my ear. I imagine it’s mor blood pumping through arteries but heart beat in the ear is probably best description! I know your blood volume increases during pregnancy but as it’s my first I just wanted to check if this is normal? It seems to come and go. I checked the nhs website and it talks about a health condition but doesn’t mention pregnancy and I don’t have any other symptoms