I have had a c-section in 2007, gallbladder surgery in 1996, and had my tubes tied in 2008... Since I have had my tubes tied I have this discharge from my belly button that looks like puss... Haven't noticed a smell but just a little worried there may be some infection... Also since my surgery in 2008 I have terrible lower back and hip pain (mostly while cleaning) that gets worse during my monthly period, also have quarter size blood clots and very heavy the first couple days.

Yes... see your doctor. Why have you not yet gone to see your doctor? Its been 3 years that this has been going on?