Ahhh 38 and just got told I'm pregnant with twins. And no I did not have in vitro fertilization…

Ahhh 38 and just got told I'm pregnant with twins. And no I did not have in vitro fertilization done. Ultra sound tech asked and one if the doctor's asked me lol. I'm 7 weeks 6 days. Im adopted. Twins don't run on my husband's side and as far as I knew twins did not run on my birth mother's side. I just asked my half sister and she said our mother had a miscarriage with twins, but no living twins in the family. I don't know anything about my birth father.