Dear patient Progesterone do not lead to back pain. There may be other reasons. Have you suffered trauma or lifted weight? Is back pain first time or this has happened before? If it s first time and no trauma do not worry as it s mostly muscular pain. Take tab diclofenac plus thiocolchicoside combination twice a day for 5 days plus tab pantocid 40mg twice a day for same period. Apply volitra gel locally for pain relief. Do not worry.