Is it possible to get a bfn on an hpt but a bfp on a blood test?

This will be my last cycle for a few months. The stress is just too much. I am 12 dpiui and tested negative on a pos this morning - fmu. I am so sad. I've had relatives test neg on a pos and pos on a beta but am not thinking this is the case for me. How common is it to get a bfn in your urine and a bfp in your blood? Slim to none? Any hope? I don't have actual pms as I would normally have it. I've been craving things, nothing unusual just food I wouldn't ordinarily want or crave. Today I woke up with a headache. I did have cramps a few days ago, but they seem to be gone. I also had 1 drop of blood on the tissue a few days ago as well - convinced af was coming. When she didn't, I pos which was bfn. I've been queasy and last night/this morning have the runs (tmi, sorry). My nips were not so much tingly as burning last night but no other PMS - usually they are so sore by now. Should I just cancel the beta and stop the progesterone?