Buprenorphine abuse

I have been prescribed subutex for about 4 months now and started boofing it to get better affects about 3 months ago. This past week and a half I have been using it IV. I?m a huge hypochondriac which doesn?t go well with an IV drug user especially when you don?t know much about what you?re using. I plan on checking myself into inpatient very soon but until I can get in I want to know how I can reduce any harm done to myself when using this IV. Also if I decide to start boofing it instead is there any major health risks I?m facing for that either? I?m scared to start taking it sublingually again because I don?t want to go through withdrawals by going from 4mgs iv to 4mgs under the tongue. Any advice would be much appreciated.