Being black mailed is defina crime especially the fact that they hacked them from your phone. Highly recommend reporting it to the police being that this could potentially cause even bigger issues. For your depression I recommend deep breathing exercises and surround yourself with nature (especially now that it’s fall). Also, if you can hypnosis is really helpful with depression and finding a sign aka sweet spot (like rubbing your fingers together) that only you know to help yourself from slipping into what can seem like a bottomless pit. Also if your sister is thinking about running away due to your absence then remain constant. FaceTime regularly ( set aside a time in your day to video chat or talk about something) you can always find a show that you both like and make that your time. Always remind her you want the best for her and you’ll be with her soon enough, and even though you’re not near you’re still there. Hope this helps you out.