To heal those cuts you need to make sure they're clean, and to help them not scar as much, lotion with vitamin E and lanolin will help reduce scarring. Now as for the cutting itself, its a destructive way of dealing with your issues and problems. Try to find a creative outlet for your issues. Do you mind if I ask why you cut? And, if you need someone to talk to when you feel like cutting, I'm just a message away, and I'm friendly. :-D
I see you suffer from stress...have you ever tried hypnosis? Its very, very relaxing, and can help with many issues that you want to change. I use a hypnotherapy app on my phone that helps me sleep. Until I started using it, my insomnia was hellacious!! Do you practice any anxiety reduction techniques such as deep breathing, visualization, or meditation? I suffer from an anxiety disorder, PTSD, which can get me rather stressed, and at my very worst, these techniques have helped me make it to calmer seas.