Suggest Treatment For Pain In Leg And Lower Back After Having Intercourse

hello dear! i have a question. i got married 6 months ago. and i got this problem after my first sex with my hasbend. it is my legs and lower back, they are realy hust and even a can not move my legs any more. i went to the docter and gave lots of medication witch is did not work. could u please tel me to what to do