It can be due to urinary tract infection
, mild cystitis or pelvic inflammatory disease
Muscular pain or bony pain due to calcium deficiency
can also be one of the cause.
Take simple analgesic, antiinflammatory drug like paracetamol or antispasmodic like meftal-spas or spasmindon till you see your doctor.You can apply some local ointment having muscle relaxant
.Drink lot of water and alakaliser, in case it is UTI you will get some relief.Do not be anxious , this is nothing serious.
Take care , keep in touch.