Is this normal??

I’m 5w2d and had an ultrasound done at the ER for some pain I was having the doctor said there is a gestation sac and a yolk sac but no fetal pole yet. My hcg is rising the way it should. 130-442-1229-6300 all within 48hrs I have beta hcg done due to a previous ectopic pregnancy. Is it normal to not see a fetal pole yet?