Hey Tina88
Have you tried other coping mechanism that are less destructive, perhaps when you next feel like self-harming have a box of distractions and things you can do instead of self-harming, you could easily print off the list of distractions and have a box in place of things you can to avoid the urge. Or perhaps have a cold shower, use red marker/pen on the areas you want to cut, chew ice cubes etc. You can get the same feeling of sh but without the nasty damage.
How about writing a list on a piece of paper of the reasons you don't want to self-harm?
For example: Don't want to go into hospital if you hurt to deep and the four hour wait to be seen
Don't want to worry lots of people such as spouse, friends and family
Don't want to feel ashamed and guilty of the behaviour, which then makes you feel even more worse about yourself