pain in back tww

Roslyn • Currently mummy to 3 beautiful girls currently ttc rainbow baby 👶🏻🌈🌈🌈👶🏻 x after 9 months of ttc our rainbow 🌈 baby is cooking away nicely due April 9 th god is great ❤❤❤
I have just got really bad pain in my back where my bra strap sits then its moving into the side of my boobs could this be a sign or could it be pms got positive opk last sat am ???? X