Can you be pregnant with no hcg?

MR

so all my tests are negative but I've missed my period. today is day 5. no cramps or anything and I feel like shit. I remember that by week 5 in my other pregnancies I started feeling sick. I almost puked in the dog park just now. wtf.if I'm not pregnant, that's totally fine, I would just like to get my period so I can try again