Suggest Treatment For Back Pain

my child has serious back pain, she is tired all the time,stomach pain, her feet (toes) turn dark purple, She hurts so bad that she crys. She just turned 13 years old. The back pain has been on going and started bothering her a couple years ago. The back pain has continued to get worse now to the point she has been out of school for 6 months. according to the docotr her MRI looks ok. Her bloodwork shows positive for ANA, but we havent been able to get in to see a specialist. what should we do? She sleeps for days and has trouble staying awake. Before all of this she was a straight A student, played sports and was very involved with school activities. Now she is home in bed 90% of the time. I am very worried. She is past due for some of her immunisations but I am worried about giving them to her. Any suggestions?