How do I stop Braxton Hicks contractions?

You cant stop it, the only thing i can suggest is your baby might be back to back, i had this with my daughter and it was horrendous, constant Braxton hicks so i know how you feel!! If this is the case theres three things you can try to get him/her to turn, one is to walk sideways up and down the stairs (i know it sounds wierd but it gives baby room to turn), or get on all fours on you bed and put you bum in the air and gently rock from side to side, this really seemed to work for me. She did turn eventually. and third, take a nice warm bath and relax, if you chill out, so will baby and that will make it more likely to turn. hope this helps and you get some rest soon!