What shall I do with this urine sample?

[onemorecakeplease]

This might be the stupidest question ever but here goes...

Dd(5) is sore when she wees and has pain in her tummy. She also has a sore throat, head and has had a temp all weekend.
It may be a virus and the temp is making it feel sore when she goes to the loo or I wonder if it's a UTi

So I took a urine sample tonight to take to doc. How do I store it tonight? In the fridge? Or should I empty it out and take another tomorrow and drop to docs in the morning. Or can I not use the same sample tube again?

Thanks for reading!

I'd wash out the sample pot and try and do another one tomorrow.

Hospital doc told me to store it in the fridge if it's going to be 'out' for more than 5 hours