Don't reuse syringes. Harm reduction 101.
Nobody likes hearing it when it's hard to obtain them or whatever your reasoning may be but it's a critical topic to touch on. Be a realist when it comes to it. If you do it consistantly then next time, buy a box if you can. Not a bag or two. Not a couple singles. Buy the box. It really is the best way to be going about it. Don't feel anxious about having so many or what other people might think or any of that sort of that nonsense. Stay safe, stay healthy.