Is there something, maybe, you believe about it that makes you feel that way?
Do you feel on some level that maybe it's bad to experience that kind of exhilirating, relax, happy experience through qigong or meditation?
It may be that you've gone deeper into yourself and are encountering some kind of energy block that you may need to work through? I don't know.
I think a healthy dose of self-exploration might be helpful here.
