Just wanted to add my eldest son smoked skunk from the age of 13.
When he was 18 he sort of went like what you are saying here.
He kept going to a and e at all times of the night and they kept saying nothing was wrong with him.
He stoped smoking it but still felt real bad 24 hours every day and night.
He asked to be admitted to hospital but they said no and if it was because of the drugs it would go away.
It did go away a couple of months later but he did sometimes have panic attacks for a while after.
He has never smoked it again and is ok now apart from being very shy and having a social phobia