Low progesterone 🙁

We had an ultrasound done yesterday and they didn’t see anything. The dr said it’s still early (I was 5+5) and that they were going to draw blood to check my hcg levels. Later in the day I got a call from my drs office and the lady said my progesterone levels were low and they sent a prescription to my pharmacy for me to start taking that night. Dr said next week we should definitely see something on the ultrasound so I have an appointment scheduled. This whole thing has me so worried.😞