Autistic daughter struggling

My daughter was diagnosed in January and attempted an overdose not to long after this

a few weeks later she was found on a bridge by a member of the public

tinight she went missing with a freind who was running away from home but we tracked her down and found her 25 miles away!! There is no remorse which I understand but I feel like we are with her 24 hours a day and she should be safe at school but we are really struggling!! I hope it will get better one day and we are getting all the help we can but at the minute it doesn’t seem like this difficult time will end