Satanists are no more demon worshippers than Christians are cannibals. (Think of Communion.)
Also, this is really a work of fiction, as people have proved that Michelle's story makes no sense.
Basically, SRA is a crock. Flame me is you want, but there are a whole bunch of sites to back me up on this one, though most use nicer language. There's this one, this one, this one, this one, this one, and this one for starters. If you think you went through it., I would get a second opinion from another doctor- one who isn't charging you for 'uncovering more memories.'
Now that I've got that out of the way, the nasty little piece of work you read was probably "Michelle Remembers," by Michelle Smith & Lawrence Pazder, that's the most famous. Some others include, "Awful Disclosures of Maria Monk", "Breaking the Circle of Satanic Ritual Abuse..." by Daniel Ryder, and some other tawdry pieces that really don't matter in the long run. Sorry to spoil the fun. (And if it makes you feel any better, the Necronomicon's not real, so it's not like I don't pick on those interested in the other side.)