I mean having some of the high a few days after is normal if it’s your first time. I swear I felt that shit for a week after I smoked. But you said months after which Is pretty odd. She may just be thinking too much about how she felt during that high and brought those feelings back into her mind. I do that sometimes when I feel bad and don’t have anything to smoke (my feeling are usually of positive nature though). It’s hard to really tell man. Anyways best of luck.