Eeek try olbas oil on your forehead.
Frogchops, I think you need to talk further with your dh. It's not fair that he's letting it be solely your decision.
I'm one of the posters mentioned by squid that would have the nuchal but no further testing. I wouldn't have worried, I'd have done plenty of research into ds and what was available to me locally. Having discussed it with my dh we both new that we'd keep the baby no matter what and I actually felt very positive that we'd cope. If the amnio was risk free then it'd be a no brainer, but there is a risk of miscarriage or infection.
Everyone is different tho, so if you're going to spend the rest of your pregnancy fretting then it probably worth having the further testing done.
You probably also need to discuss what your decisions would be if the amnio came back as positive.
Good luck, Frog, I'm thinking of you.