I will try as you suggest tomorow morining and see if there is any difference..
I did notice that is was getting worst progersively over past 3 or 4 weeks..
I replaced all of the glow plugs with new Bosch glow plugs.

The only other thing that happened is, I had a leak in one of the fuel lines leading to the filter that I replaced, but it was working fine for almost a month after that.