Dreams that exhaust

Last night or early this morning I had a dream, a dream so bizarre it's not worth talking about except to say that I woke up exhausted.  This is not the only time I've been exhausted by dreams and somehow I just don't understand why.  I wake up feeling like I've been hit by a truck and it takes me forever to get going.

Tuesday morning is yoga morning and as I missed my class last week I really didn't want to miss another one.  So I dragged myself there as I know it's a time I can be quiet and still in my mind.  To just BE.  Well this is what we strive for in yoga, to be in the moment, to be in tune with your body etc.  I'm sure I'm not the only one who struggles with thinking about everyday thoughts, things to be done at home instead of being in the moment.  "Chattering monkeys" is what my yoga teacher calls them.  However this morning I had "chattering monkeys" and a body that just didn't want to move to deal with.

I always believed sleep should  be a time of rest and rejuvenation, a relaxing of the body and mind but now I'm not so sure.  I'd like to know what causes this exhaustion after dreams as it sets me up for a very lethargic day.  Does anyone else have this happen?  I'd love to know.

Anne