Could I be pregnant even with a negative pregnancy test result?

I was supposed to get my period 3 days ago and it has not come yet. I’m usually never late for my period. When I was pregnant with my daughter who is now 3 (I starting feeling symptoms as early as a week before I missed my period). I have been feeling the same way. I was almost POSITIVE that I was pregnant. I have taken 4 tests and they have all been negative, which makes me think I’m not pregnant, but is there a chance all three tests could be wrong? Or maybe with this pregnancy, there is not enough HCG in my urine to give a positive result? Has this ever happened to anyone?