I never used to have period pains before but recently i do and the pain is usually sharp, what could be the cause?

Pelvic ligaments?: Dysmenorrhea has several causes; Hypermobility Syndrome is a common genetic variation highly associated with this; see Brighton or Beighton criteria. Recent childbirth can loosen pelvic ligaments as can bio-mechanical injuries. During menses hormone Relaxin is released; further loosening pelvic ligaments; enlisting painful compensatory pelvic muscle spasms. Many sufferers benefit from Cannabis.