(Hugs) hope the competition went ok. Sorry you are having such a tough time with all of this. Safely, there is no way way to hide it except clothing. I grew up in south Florida and was known to wear long sleeve shirts and king pants even when it was 90 out (Can i tell you that sucked big-time! )
I did not yet read your other post, but maybe it would be helpful to tell someone? Do you have a clinician or doctor you trust to talk to about it? It sounds like they were receptive about the eating thing, but it also sounds like you are supplementing the eating thing with the cutting. If you don't deal with the root problem, you may just end up switching coping skills again when they work to stop the self-harm. Are you working with a therapist? (Hugs) hope you have a good weekend and can stay self-harm free. Of you are near one of their locations, the renfrew center is a great resource for eating issues and self harm... they got me through high school, and they have several locations.