Sleeping Posture

Hi, hopefully this is the right place to post this question. I've had trouble the last few weeks with forward head posture, went to physio awhile ago and it was mending but then I started getting into bad habits and being lazy. One of the worst things is when I sleep I keep my head forward or to the side and lay on my front. Any advice for improving this, or pillows? I usually struggle getting to sleep from anxiety or using my phone, tablet or games a lot. Thanks!