Bleeding after cesection. And 2 weeks?

What could be the reason why I still irregularly bleed after my c sections, its been 2 months and 2 weeks?Below is the time line: 1.October 18 was my csection, I bleed from oct 18- Nov 29, then Nov 30- Nov 31 bleeding stopped already 2.Dec 1 bleeding start against up to dec 9, but this bleeding really really less like spotting 3. Dec 10-dec11 bleeding stopped 4. Dec 12 bleeding start against, thus bleeding start less then become more then less and stopped,Its like my period, last for 7days( dec 12-dec 18) 5.dec 19, bleeding stopped 6.dec 20, bleeding start again this time is a big bright red spot but after 2 days became less and stop 7.Dec 23 stopped bleeding 8.dec 24 bleeding start against, 4 days start pink color very very bless(dec 24-dec27), dec 28- dec 30, bleed like dark red blood color but very very less, dec 31 bleeding become bright red and this time  more, January 1, bleeding become more and the same as of now January 2.