Hello...I'm 21years old and last had sex on the 7th of November last year, I then had my period on that same day. I've had all signs of pregnancy and took a couple of tests which all came out negative. Yesterday I went for an ultrasound and there was nothing, nothing in my womb. My period is 3days late now. Is it possible to have an ultrasound when you're 2months pregnant and not see the baby? Could I be pregnant?