Probably a stupid question, but

Could a blood test for pregnancy still show up negative at 3-4 weeks?

I won't get my results until Wednesday, but I feel like it was still pretty early

not likely. blood test usually will show results earlier than a hpt.

Ive heard of it not being able to, but i dont think its that common. There usually more sensitive than a home test.

Not likely, but it can happen. But with this pregnancy I didn't get a home test positive til 6 weeks. At first I thought maybe I was off with my ovulation.

Quoting Riley+3:" Not likely, but it can happen. But with this pregnancy I didn't get a home test positive til 6 weeks. At first I thought maybe I was off with my ovulation."

I guess the blood test showed some HcG, and they said it shouldn't have shown any, but I'm not considered pregnant.
I have a follow up, and I'm hoping they'll re-do it just in case

I was told they don't consider pregnant til there is more than 10 uI(so) of hcg. 0-5 is considered normal levels.