Negative long term effects from weed consumption. What do we do?

My partner was an avid weed user for about a year (3 times per week/edibles) taking edibles. This past March, they had a bad high and they are now dissociating pretty frequently, mostly when they are tired and/or anxious. They have stopped all consumption, but this has now resulted in an almost constant state of derealization and its now begun to affect their sleep cycle. Is there anything we can do that might help? They have already signed up for counselling but are scared of medication (too expensive) but they need a short term fix or anything to help honestly. They try the grounding and the music and even crying, but when they notice them not working they get even worse. What can we do?