Heavenly Father have Samantha go see a doctor for this can be symptoms of a tumor or something very serious that needs urgent care, or too much stress causing this. We know that there is no way she can be pregnant unless she has had intercourse. Your Son was the only one that was born without his Mother having known any men. So give her the wisdom she needs, and may she allow you to guide her steps on what to do right away. Give her the courage she needs to talk with her parents about this as soon as possible so she can have peace of mind and be able to concentrate on her studies. May she make you the cornerstone of her life so she can stand on solid ground and not in quicksand. I pray and thank you in advance in Jesus Christ Precious Name, always giving you all the Honor and Glory Heavenly Father to whom all power belongs, Amen!