There is nothing we can say that will make you stress less but those results are not too bad OP.
With my most recent pregnancy I had odds of 1/194. The scan was perfect, the bloods were not.
I had the amnio and our baby boy is fine.
Those results actually come down to a 0.25% chance OP, pretty good odds. Not even a quarter of a percent and you had a great scan, things are looking good
If the amnio will set your mind at ease for the rest of the pregnancy then IMO you should have it. I know I could not of enjoyed my pregnancy without it.