NERVOUS

So I’m reading my “what to expect” book and came across “blighted ovum”. Has anyone experienced this and KNEW something was wrong? I have my first scan this Monday at 10 weeks and terrified they will find an empty sac😭 I still “feel” pregnant (sore/ tender breast’s, nausea, fatigue, food aversions, bloated belly). Just want to know if I need to be aware of any bad signs!