My left breast has a fowl odor, discharge, and is painful, what cld be causing this and i've also noticed a few lumps im only 28, my nipple caved in

Get seen now: This needs to be seen by a competent physician now. Please don't delay. This may be anything from a serious staph infection with delay possibly resulting in disaster, to a curable cancer for which timely treatment would save your live. Nobody here can tell you anything more.

Please see a doctor: Any new breast mass, nipple discharge or skin changes should be evaluated by a physician.