You should acll up your nearest medical care centre and schedule an appointment with a doctor, who could then refer you to a specialist.
lumps are not cancerous.
Symptoms of male breast
cancer include lumps, changes to the nipple or breast skin - redness or scaling, skin dimpling or puckering, or nipple discharge.
What you need to do is get a clinical breast examination done by a physician. If he notices something amiss he will suggest a mammogram and USG.