6 weeks pregnant and spotting

Hi everyone,

I'm about 6 weeks pregnant and have been spotting for the last 7 days. I had an ultrasound done last Thursday but not sure if it is an empty sac or if there was something in there. I know I should have asked my doctor but I was a bit frazzled. The spotting is light brownish sometimes light pink and about 2 to 3 times a day and I dont have another ultrasound appointment til next week and i am so worried. If anyone knows how to look at ultrasound pics please let me know what u see.