whitish poop/pain in butt crack bone

I am having pain all the time in the middle of my butt crack.  Any pressure makes pain in that feels like it is coming from the bone.  I continuously have pressure like I have to use the bathroom but I don't.  If I do have to poop it comes out brown with either white or yellow mixed.  Alot.  I sometimes have to apply pressure to the area between the anus and vagina to help with the pushing.  It is not constipation it is like I don't have enough pressure.  The pain is getting worse and can hurt all day.  Thanks for the help.

[CalGal]

If you're having whitish fecal material please see your doc. It could suggest that you're not putting out the amount of bile you should and that could be causing problems.