Evryones body is different, and yours must know something is up, I think it is fine for you to put it in a cintainer, I rememeber when I was a teen not saying you are)and had to use the ehalth dept for b/c and they asked me to bring first morning urine sample in a clean container so they can make sure you aren;t preg b4 they put you on anything............Good luck
btw, how old are you? Don't have to answer that of course, what are the other circumstances surrounding your situation, is the would be father there for your support? I wish the best for you