the vaginal discharge
post partum / post delivery are called lochia
The color of the lochia changes more or less from week to week.
1week post partum: re
end of week one: brown
end of week two - dark yellow
end of week 3 : greyish-white
end oif week 4 until week 6: lochia stops
Are you maybe on any iron medication?
That often causes cramping and obstipation.
I think the lochia are okay no need to worry there.
The obstipation is most likely causing the cramping.
If you`ve had an episiotomy
or have had a tear - then sometimes - "newly born moms" tend to be frightened to have bowel movements - and postpone these - which leads to constipation
You might like to take something to help you digest, and to help with the constipation - and once your bowel movements are back to normal the crampung will cease.
all the best,