Was the nurse right?

Mamatoruben • 💙💗💛💚
Ok. So last night I went to er because j had pain in my abdomen.
I've recently done pregnancy tests that have shown positive.
Before I got called in I when for a pee, an i was drinking loads of water after it.
She wanted me to do pregnancy test, my pee was clear as day.
And the test showed negative.
I told her I just been and I've drank load of water since and she said that it wouldn't matter hcg will still be detected.. Hmmm