Cyst on babies brain?!

Nicole
Ok so sadly I just got done wasting my time and having my nerves exposed by seeing a genetic counsleor. My labwork is all normal low risk for everything. Apparently on my sono there was a brain cyst I forget the actual medical terminology for it. Apparently its associated with trisomy 18? And my blood work showed a 1 in 7,500 chance of this trip my 18. So anyways my scan today which is 16 weeks 2 days is not showing any visual abnormalities. So I've spent the whole afternoon crying hysterically. Did anyone else have this and turn out to be ok?! 
This cyst isn't linked to brain tumors or brain cancer thank god. Ugh idk how to feel or what to think.