Beta hcg test.

Hannah • 5 beautiful children 14 angel babies pregnant and shooting for #6: the last one
Hi I'm 12 dpo now. I have the flu or what we think could be the flu (vomitting, sinus issues cold chills etc.). Yesterday (11 dpo) my DH had to take me to the er from being so sick. They did a beta hcg and she said it was negative. From what I read they show up with a yes or no and it is 25 hcg or higher like a home pregnancy test. Is there still a chance I could be in? AF is due 12/1