24 Urine test is stressing me out and I can't fill the container.

22F Metaformin, PCOS, Obese I was given a 24 urine test by my doctor to test my cortisol. And for the life of me, I can't fill it. I tried everything I could, and I drank water, tea, warm water. when I do pee, it's only a little bit. I'm scared the test will just be a void or something. I really don't wanna do this again. But I just just can't fill it. My mom says to not worry about it, it's not my fault. But I don't know. i just wanna know if it is worth continuing? I started around 5 a.m., and it's been 13 or 12 hours (rough estimate), and I'm barely reaching the first line of the container.