Hello Cait, and a very warm welcome to the site.
You have done extremely well to be 9 months clean from self-harm and should be congratulated, unfortunately, with any type of depression there can be a relapse, big or small that could be triggered from previous experiences, although I'm not a doctor, I've had a few myself.
Removing any object that may harm you is a great start, but I wonder whether you could write down some triggers that haven't actually been discussed with your doctor/psychologist, then once you can talk about them they will provide different solutions that will enable you to cope if these situations suddenly happen.
It's very difficult to do this by yourself and if you do decide to seek help, ask your doctor about the 'mental health plan', this enables 10 Medicare paid sessions you don't have to pay.
Would love to hear back from you.