Hi Amy, here's the facebook group for LDN for ME -
https://www.facebook.com/groups/200010163370187/ If you pm me your facebook name, I'll get you added to the group.
They've lots of files with information on compounding, dosage, experiences, etc. Well worth a look if you're on Facebook.
I went gung-ho into LDN three years ago, I started on 1.5mg, but many more sensitive souls find they have to start as low as 0.05mg - though most start at ten times that, 0.5mg. Start low, go slow is the general advice. I wouldn't be without it. I find now I can take a night off to advantage (when I need to compound more supplies), but it's risky to take two nights off, and three nights off is just plain stupid.
One friend of mine found LDN aggravated her gut symptoms, the theory is it was because of a Candida overgrowth. She found success using a transdermal cream version of LDN, from Dicksons (though I think she's making it herself now).