Anxious after my visit with the ON

I am 31 weeks pregnant , and I had my regular OB visit as well as a growth scan today. My OB said baby was growing great , heart rate , fluid everything ( for the most part ) looks fine however they saw something like a cyst on the heart.

I’m going to be doing a fetal echocardiogram and we are also awaiting final ultrasound results from today after I guess someone else reviews them

I’m feeling so anxious , I had a loss at 15 weeks due to Turner’s syndrome and it was first described as a cyst so this whole thing today makes me relieve everything all over again

My OB isn’t concerned she said since everything else looks normal it’s highly unlikely this will come back as something serious

I just can’t shake this feeling of anxious and worry away