Coffee beens are very strong herb, and like any strong remedies, may cause unpredictable reaction in people who can't tolerate it.
There are people who are severely intollerant to wheat, while the rest of us can eat it without any problem.
There are people who are severely intollerant to milk, while the rest of us can eat it without any problem.
The same goes for nuts, aspirin, Antibiotics , spices, herbs, etc.
Why would suddenly coffee be any different?
There is always someone out there, someone who will have problem with something that other poeple have no problem with.
To make sure you or anyone else does not repeat the same mistake, when taking any herb from the rear end, try always very small concentration first (1-5% of the recommended dosage), and later increase if no negative reaction.
If you tried 1-5% of the coffe you used, your reaction would have been, maybe 1-5% of what you experienced.
That would teach you to be carefull and not to try it again.