Suggest Remedy For Painful Vagina During Pregnancy

hi im 26 weeks pregnant i have been getting back pains at night and i do believe its normal. But i been having pain around my vagina for the pass 4 months. i when to the hospital but they just said i needed to drink water more often and i have but the pain isn't going away. It hurts more at night when im getting ready for bed. I don't know how to explain but i cant have my legs seprate my fiance helps me at night when i have to get up to use the restroom he grabs my two legs together and slide them down to the grownd. When he dos that it dosen't hurt as much but when i do it by my self it hurts. I don't if im stiff or something but please let me know what i can do to make the pain go away thank you.