Vaginal pain during intercourse... 6 weeks pregnant.. help me please?

My vaginal region is fine while me and my husband fool around with out penetration, but as soon as he penetrates me in one specific spot about an inch maybe half an inch on the left side of my vaginal wall it hurts like crazy. Its a stinging pain and its too painful to continue with intercourse... so we have to stop... ive never had this problem before, and ive been pregnant twice before but have never experienced any pain like this during intercourse, i also know for sure that i dont have an STD.