All good buddy! The reason substance identification is against the rules here is that it'd be a bit reckless for someone to tell you that what you have is LSD, instilling a false sense of safety, only for it to turn out an NBOMe. You thought it was LSD, so taking 5 tabs at once will be safe (as far as toxicity goes, that is). Alas, whomever advised you that it was LSD was wrong, and you just consumed a fatal dose of 25i-NBOMe.
Given even substances such as MDMA cannot be identified based on ANY physical properties like appearance, taste, smell, or even effects, the chances of correctly identifying a substance you can't even see sitting on tiny piece of blank paper are next to zero.
Ehrlich's reagent test kit is about as definitive as you'll get short of sending a sample off to GC/MS lab testing. It would be wise to invest in one
otherwise, if you plan on taking whatever you have without testing it, start with a single tab (or less, if they're allegedly 'strong'). While this still isn't safe as people have experienced health complications from a single 'normal dose' of an NBOMe, it's about as safe as you'll get without simply throwing them in the bin.
Anyways, I gots to close dis thread for reasons above
feel free to shoot me a PM if you have any further concerns, otherwise you're welcome to start another thread with questions so long as you've done a search for similar threads first, and ensure you're adhering to the rules this time
Otherwise, welcome to Bluelight and happy SAFE tripping!