nothing in sac?

i cam to er today for bleeding after sex. the bleeding stopped but they said they couldn’t see anything in my sac when they did ultrasound. i am 5w 4d give or take. they said my hcg is at 7000 and they want to retest and do another ultrasound in a week. has anyone went through this and had a positive outcome? everything i’m seeing says it’s probably ectopic. thanks in advance