Hi everyone I haven't given birth before; I've only had one miscarriag…

Hi everyone I haven't given birth before; I've only had one miscarriage in 2019. My last period was March 21–24. I'm 12 days late. On the first ultrasound there was a corpus luteum in the right ovary and pregnancy tests were negative; I also had strong, unpleasant pains and no discharge. On the second ultrasound the corpus luteum was already in the uterus. hCG was not detected in the blood. They prescribed folic acid and Utrogestan. I'm taking them. The pains have gone. My period still hasn't come. The doctor said to wait a week and repeat the ultrasound and hCG test. Can anyone tell me if they've had a similar situation? People say not to worry, but how can I not worry....