Can xray of chest show enlarged aorta? While im waiting for apt to heart dr im afraid to move. Can anything I do make it rupture,

Unlikely. Size? Location, Other risk factors? Control blood pressure take meds:? Losartan as well as metoprolol, is being popularized. Severe straining- like massive weight lifting is worth avoiding.
Yes it can. Depending on where aorta is enlarged the chest X-ray is quite capable of showing an enlarged dilated aorta. Usually simple movement is not an issue. Keeping blood pressure under control and strenuous activity might be avoided.