I broke my foot 6 weeks ago, its healing but I now have dvt, I've been told I can weight bear but can't walk with discomfort of swelling.?

Post phlebitic pain. Phlebitic pain common frequently overcome by support stocking.
See your doctor. This is a problem that necessitates a face-to-face meeting with your doctor. This will allow him/her to examine you, ask specific questions. And possibly order tests to find out what's wrong and what to do to help you.