prgnaunt and the not!

Okay so I thought I was being taken before but now its gone too far after a long night that I won’t even dare say on here I got home and I felt sick like sick to my stomach I raced to the bathroom only to throw up a green fomey substance a week later the same so I bought a pregnancy test ( I have not had sex in a year!!) The test came out positive a couple weeks later I went to my doctor he said its weird because my womb and afterbirth was all there but no baby I’m terrified there’s no way (they) could have impregnated me right? And if they did where is the baby it had only been a couple weeks there’s no way I could have had that baby I don’t know what’s going on but I’ve made myself sick thinking about it