Achy/heavy feeling in pelvis

Catherine • Hi! I'm Catherine, I'm 29 & mummy to 3 little boys. Mason Elliott 26/03/16 💙 Ezra George 22/05/18 💚 Archie Emerson 02/07/20 💛
I'm 16 weeks and for the past week or so I've been feeling this very uncomfortable heaviness low down in my pelvis area. Is this normal or should I see my midwife? I'm freaking out a little as my last pregnancy ended in M/C :(
Thankyou!