is this normal?

i went to the doctor yesterday

i had two very positive hpt

my hcg quantity was 4500 and the ultrasound didn’t really show much, but the transvaginal ultrasound showed a empty gestational sac no yolk sac or fetal pole.

my last period was march, 22nd - 27th i am very irregular but shouldn’t i be further in?

is everything normal? i’m so scared.