NT test results - higher risk

I just got my results from the first trimester screen (blood work & ultrasound) and I was told I have a higher risk of abnormalities. About 1:73chance. Considering my age, it should be around 1:1500 so this has greatly upset me.
I feel devastated about these results as I don't believe I could care for a baby with a disability/disabilities without feeling resentful. Likewise I don't know how I would terminate either. I'm looking into further testing, and the support I've received has mainly been "don't worry you have a 72:73 chance of being fine!" But considering I also suffered an ectopic pregnancy (1:50 chance) I feel there's no way this can go well. 
Has anyone had an amnio test without causing complications? I'm terrified I would get the test done, find out baby is OK and suffer a miscarriage from the testing. I'm just a wreck.