Am I over thinking?lol

Day 4 out of a minimum of 31 days sober and not only am I extremely proud of myself, I haven’t suffered too intensely with withdrawal symptoms and I’m excited to carry on this amazing journey. That being said, I have some CBD flower that I want to smoke as I’m seeing some stoner friends tonight but if I use my normal grinder that I’ve been previously using for general bud, will I inevitably end up with THC in my system too? I might be massively over thinking this but I’ve done SO fucking well these last few days and I really don’t want to get high. I cannot believe I’m saying that either. 😅 any advice would be appreciated, worst case scenario I might just cut it up with scissors hahahahaha