Yeah, it would have to be something else, because the average small dose is around 150-250 micrograms, or so, and the average large dose is about 500 micrograms. IIRC most acid blotter papers have 100 micrograms per hit. Think about this, a microgram is a millionth of a gram, so that's 2,000,000 micrograms of acid it would take, probably even more, since that dose was intravenous, and acid blotters aren't.
So she'd pretty much have had to have eaten quite a few full papers.
Oh, and if you mean "had a very bad trip because she too way too much" that's not ODing. That's just taking a bit too much.