can the obgyn pregnancy test be wrong?

Mariah
So I had an obgyn appointment today and I told my doctor I was 2-3 days late and they tested my urin. It was the second urin of the morning and there wasn't a lot. She said it was negative, but told me that if I missed more than 5 days to test again. I recently just had very wattery discharge, and it felt like I peed my pants! I'm so confused 😰 I would call my doctor back but I'm too scared to ask my mom for the number because I don't want to worry her.