Welcome to HCM
We understand your concerns
You don't have to worry and read too much into these things. Eating excess sea food need not cause cyanide poisoning
. Coffee and beer together might have created your problem. But nothing to worry. You were anxious about your food and drinks prior to going to sleep. That might have triggered the anxious feeling and dizziness
of the night. Just relax. Consult a psychologist
or I can help you online if you desire so for counseling.
Good luck. Enjoy.