Suggest Medication For Intensified Braxton Hicks Contractions

this is my 3rd pregnancy. I have been having BH for months. the last month they have intensified greatly, and in the last week and a half range from 7 to 10 min apart for 3+ hours,, stop and start up again a few hours later. Had very lose stool last week for 5 days, and now it has turned a yellowish color. had some spotting Sunday and yesterday. No longer. I am 35 weeks 4 days. My other two pg ended in C-sections because I could never dialate past 3, even on petocin for 16 hours with the first. My OB doesn't seem concerned, but with my history of these same issues with my first child I am a bit nervous as she was distressed and passed a bowel and my first OB saw when he broke my waters to try and get labor moving.. which it never did! I just know I am a bit early and have made two calls so far one last friday and yesterday about the spotting.. Not sure if I should be concerned or just wait until Friday to see my OB.