Even safer than wine as far as i'm concerned! I think you did all the right things and with multiple negative home tests you should feel good about it! Like FBR said if your over the 20 threshold on creatinine your good. The only way they would be able to tell if you have "low" levels is to test you before hand. We all psych ourselves out so try and relax and when you get that negative result back smoke one for me bud!