I've done that with weed where I felt ego death basically, because my dose was too high as well. But the next day I felt fine. I've been using CBD oil as an anti-anxiety treatment, it works quite well.
CBD is great for dealing with anxiety. I use broad spectrum drops and take quite a high dose a few times a day. Because the broad spectrum doesn’t have any thc it’s still easy to get work done with it and sometimes it even helps with getting started on something.