We don't allow ID threads here, sorry. No-one but a lab can tell you for sure what it was, and no-one here is equipped to speculate accurately from vague descriptions of taste/effects.
If you've taken LSD itself before you should know because the experience will be very different if it is something else. If it feels about the same and it's the taste putting you off, I wouldn't worry, since the ink can taste bitter too - and also some more strongly laid blotters sometimes have a bit of a taste, as LSD is most definitely not tasteless, it's the small amounts present that make it so.
Numb tongue/gums is sometimes common with the NBOMe series drugs - along with a shorter duration similar to that of an average dose of LSD.
As for DOx and most other drugs sold as LSD the most common way to pick them out is that they come up takes several hours and then the experience can last for 16-24+ hours, even when it's clearly not dosed very highly.
Hope this helps, but your best bet if you have any more of them is to get an Ehrlich's test kit and test one - if it goes purple that means it's an indole based psychedelic, which in blotter pretty much means LSD-25 or another derivative (e.g. ALD-52 etc) or 5-MeO-AMT, so you can safely assume if it turns purple and the effects seemed in line with what you've read about LSD, that it was.
Anyway, closed.