I am 78 year old man. I have diabetes and CHF. I recently just got over a cold. I did have a chest xray done last week, that showed an enlarged heart, nothing else. Recently, the past few weeks, I ve become very unbalanced, lightheaded when sitting down or walking. I have been checked for UTI and that was negative. I can not get into my cardiologist until June 5th. I m concerned?