Disappointed

Seeing the nice weather, I decided to go for a run even though I am nursing a slight cold.
The run starts out good.
I am able to maintain a pace of less than 7:00min/km for the first 2 km.
After 2km, I just felt like walking home.
Sigh...very disappointed with myself lor.

Ever since Chinese New Year, not able to achieve a sub 7min/km run.
Why???
I am 9 kg lighter, doesn't that means that I should be able to run faster?

I have taken 7min/km to be my worst pace, but things are just going south.

Another horrible thing is that my tummy seems to be making a comeback.
Although I gain back 1kg after 3 weeks, I seem to have put back quite a fair amount of fat round the waistline.
But strangely, the pants is just as loose.
Not too sure if it is an illusion or not, but the fats seems to be accumulating at a pretty quick rate. HELP!!!