Does High Dosage Of Vitamin-D Supplement Cause Nausea And Constipation?

My Vitamin D level is low at 22. I have been told everything else is at normal levels. I am taking 5,000 I.U. for three months. Is this appropriate and does too much D cause some constipation or mild nausea? Can I get away with 2,000 I.U. a day and boost my Vitamin D count?