Need Ways To Prevent Leg Cramps And upper backach

Okai well i’m 27 weeks pregnant and i get the worst upper back ach right inbetween the shoulders and across them and sumtimes it even goes down my lower back…and it hurts my chest sometimes…and almost everynight i get leg cramps and they hurt so bad i cry…I need your help ladies if anyone knows anyway to make this less uncomfertable or to prevent it please help!!! I’M IN DESPERATE NEED!!!!

Thanks Brittney:)