As other users have said :
You should really make sure that it is real LSD via test kit.
You may be abnormally sensitive to psychoactives (more specifically hallucinogens like cannabis and LSD)
You could have underlying health problems that were exacerbated by the stimulant effects of the "LSD" combined with the sensitive psychological state. Combining such an intense dose of "LSD" and Cannabis is sure to make anyone's heart beat faster.
Your doctor was probably just trying to scare you. You should ask him specifically why you were "near death".
Speaking from personal experience :
I'm glad you have learned your lesson. Everyone has had bad trips. Some are more profound than others.
It sounds like you were impacted on a very deep level by your experience.
I have had trips in which I thought I was dead or in a coma and just living in a dream.
They were so intense and convincing that I am often convinced I am still dead or in a coma.
I feel as though everyone has their own little delusions.
The trick is to view beliefs and ideas for what they are : a POINT OF VIEW. A way to explain your life and the world you experience.
Once you start to ground yourself from that basis, you can explore other ways to explain the world and live in it.
I suffer from delusional thoughts, anxiety, and paranoia.
The method above helps me to calm myself and center myself in the present moment.
Here is an example of a thought pattern :
-Sweeping up at work- -notice I missed a spot- -takes extra time to sweep spot-
-Hear voice inside head saying "Thank's so much man!"-
-Attribute it to being the voice of the spirit of a worker in the shift after me speaking backwards through time to thank me for sweeping up for him.-
Wow, I am insane...
As for the spirits calling you to leave your physical body to transcend into higher planes of ecstatic existence:
I definately wouldn't trust that, especially considering what you're risking.
You would literally be giving your precious life here on Earth based on some vivid perceived experiences you have.
Just because you had them and they are vivid doesn't validate them. We have things called imagination.
Sometimes our extra senses can lead us in the right direction, and sometimes not.
If you believe in spirits and higher planes then you shouldn't be so naieve as to listen to just any spirit and sacrifice your Earthly body.
It's much more likely that this life is a sort of test and if you pass then you transcend to a higher level.
I think the spirits you encountered may certainly be shapeshifting and misleading ill-willed spirits.
You are blessed with a spectacular chance at life here on this beautiful Earth!
Don't ever feel like you're alone. If you want someone to talk to, this is your best outlet.
We're all mad here. Don't let anyone fool you.
Most of the clean faces be the most dirty.
Please PM me if you feel you want to talk in private.
I'm sure I can relate to some of your experiences.
I wish you nothing but the best.
Maybe try taking up meditation and yoga in order to get a stable footing in this reality?
It's all in your head. Stay away from hallucinogens for a while


Heaven existing here between Hell
We surf the transient wave, balancing on our breath, building and destroying until death.
We are the divine creators and destroyers.
We are the portals & black holes.
We choose what we manifest at the present moment in whatever dimension we inhabit.
"We are the ones we've been waiting for" - Hopi Proverb