A standard hospital drug test would come clean for both LSD and RCs, I believe. At least, they'd be very unlikely to come back positive. Most RC psychs will not show up on a hospital drug screen, if I had to guess. There are probably hundreds of different psychedelic RCs being synthesized now, it's really impossible to be familiar with all of them, I only really know what good, clean acid tastes like because I've done it probably 50+ times lol. Anyway, did you dose all 5 tabs at once? That would not result in a 30 hour trip if it were legitimate LSD, I've done just under 400ug and that trip lasted no longer than any other, it was just much more intense. Unless you meant that you kept redosing. Now, this is TOTAL speculation, but going by the duration and cardiovascular events, it sounds like it could be a DOx compound, which are known for being rough on the cardiovascular system in the event of overdose because they belong to the amphetamine class (and with these compounds, 5 tabs could easily be an overdose). Or it could be something else entirely. But if it lasted for 30 hours, it was not LSD. I think you should definitely see a specialist now to ensure that no lasting damage has occurred, likely not, but your panic attack may very well have been an OD.
If you still plan on trying acid, at least get yourself an Ehrlich reagent testing kit to rule out NBOxx compounds and a marquis reagent test to rule out amphetamines, it should work on DOx compounds, but do your own research too because it's your own body and not all of these chems are particularly well-studied. Better yet, order your own (safe) RCs so you can have a better idea of what you're getting. 5 tabs+30 hour trip+serious cardiovascular problems tells me you probably OD'd on some RC and didn't just have a panic attack. It sounds like you'll be ok but in the future, if you have even the slightest doubt, one tab only!
Now when you get some good LSD, which I think you'll do just fine with, a beer or a few is all you need
it'll get you through the come-up, but wear off before/during the peak (as long as you time it right) and will not dull the trip nearly as much as a benzo would. This is my preferred method of coming up on high dose L, and I'm not even a fan of drinking. Best of luck!