Ectopic pregnancy?

Hey everyone so long story short, I found out I was pregnant and based on my lmp I should be around 5-6 weeks pregnant. Due to my history of previous pregnancies I always get seen for a scan and bloods when I get pregnant. This time I went and the scanner seen a little tiny sac but nothing in it, took my bloods and the dr phoned me and says that my hcg levels are 1500 and that he would expect the scan to show at least something, I get my results tomorrow for my hcg as it’s been 48 hours but I am freaking out because they think an ectopic pregnancy could be a possibility, has anyone experienced something similiar?