What Causes Contractions And Abdominal Pain With Discharge During Pregnancy?

hi i am 32 weeks and 1 day pregnant. recently i have been having what i can only guess are braxton hicks contractions, however sometimes it is accompanied by a sharp pain in my lower abdomen. my back has also been quiet painful. iv tried walking, hot baths, and just trying to relax but it still happens at least once a day. (walking seems to increase it, i had 3 within 2 and a half hrs yesterday in walmart with my husband) when i do have the occasional sharp pain with the tightening almost cramp like braxtons i notice a thick white discharge with no odor. normally there is only enough to coat the toilet paper but if the pain lasts for a little bit theres about a table spoon of it. i also feel like a tightness or pressure in my pubic area. is the baby just dropping? or should i worry about premature labor? i dont have another ob appointment untill thursday and i would really hate to bother her if it turns out im just worrying for nothing...