Yes that happened to me with my first pregnancy and this one.. with my first one I didn't get a positive test until I was 3 months pregnant but I was pregnant clearly on the ultrasound with this one I was a month when it finally showed up my midwife said it was just something wrong with my hormones that my levels were just hidden even from blood test
Yea mine was like that for both test n when they did an ultrasound I was 6weeks pregnant my doctor told me some peoples happen to b like that why u think ur pregnant