Yes. I got a positive blood test but when I went to test at home, like two hours later, with my last remaining test, it was a big fat negative. Granted it was while having a miscarriage however I did still have enough HCG that the test should have picked up.

Not me but I know someone who did in my mom group. She got negatives so she thought she wasn’t pregnant and had to go to the doctor and when they did blood work she was 5 months pregnant