UA testing through BON

I'm just reaching out to see if anyone has had issues with random UAs with their creatinine being low. I performed UA for 2 years with court system and never had issues. Now I am going through a company the BON requires and all of sudden I have 2 "dilutes". This has been financial hardship. $1500 in 5 weeks. They asked for peth test and UA performed within one hour well peth was negative and UA my creatinine was less than 1 is that even possible. Now they want hair follicle. It will only show I haven't done anything in 5 years. I tried to ask the Dr why my creatinine is so low and what I could do. He is not nice at all very accusatory and condescending. I've done my own research and really there is no reason. I stopped energy drinks. I do drink coffee and try go as early as possible but that doesn't always work when your bedside nurse and can't go until later. Any suggestions? I've worked so hard the last few years not just in my sobriety but keep my license. I just want to give up because being accused and spending 1500$ in the first 2 months is overwhelming. Any suggestions would be greatly appreciated