Is swollen feet a sign of congestive heart failure?

It can be. Sometimes this can be from other causes, like local issues with the veins in the legs. However, it can be a sign of chf. You should get checked out.
SWELLING LEGS&FEET. Yes it is one of the signs of chf.
It could. There are many things that may be suggestive of chf. If concerned you need to see your primary care doctor.