Oh, I hear ya! I just stopped my rx for Ambien after a time of decrease (6 months of taking 1/2, then 2 weeks of taking 1/4 before my sleep dr said I could stop entirely) and I'd been on it for 1.5 years. Like the other posters said, the concern is stopping after being on it so long - so call your dr & the pharmacy, as they may or may not want you to titer down slowly instead of stopping cold turkey - and your dr can always give you a small supply to get you thru stopping or may just give you the all-clear if you hadn't been taking it daily for the whole 8 months.
On the insomnia front, it's really important to look at what the CAUSE of the insomnia is - because the pills can help with the symptoms but to really eliminate it you need to look at the origin. Me, for example, it's a mixture of mild (subclinical) sleep apnea and stress. I deal with the stress the best way I can - thru head work, exercise, etc. The apnea could be treated with a CPAP but since it's so mild, my sleep dr said I really don't need it.
It's really scary when you toe the line of dependency, and it's a scarier thing to face the addiction and tell it to bugger off, so you are brave!!! Be proud of yourself for recognizing this! Like some other posters said, the "semi-conscious" or amnesiatic behaviors alone can be scary; I apparently ate, put on self-tanner, did laundry, lifted weights, had whole conversations, and other random stuff without any recollection. To have a substance hurt you and still take it night after night is something that I'll readily face insomnia over!