This is a difficult one but you are in extreme discomfort. I agree with you ..and i think if nothing is coming out then why put more in..i would stay on soft soupy foods and be careful not to take high fibre carbs right now cause it may not be helpful whilst you are bunged up, and dont even bother eating if you dont feel like it - sounds like your bowel is overloaded and gone a bit inert.
I think if you have had constipated problems all your life then yes it is time to get to the root of and go see a colorectal surgeon - its not the end of life as we know it to be wihtout a bowel expecialy one that is causing miserable for goodness how long. Even if the Mirilax is working dont mean a thing cause it has to work ALL the time so you can have quality of life.. i know where you are coming from. we are here to help.
Karen 48 years old
1997: Diagnosed IBS
2003: Pelvic Floor repair
2006: STARR surgery for mucosal prolapse/Obstruction/diagnosed slow transit constipation
2007: Sigmoid resection-partial volvulus resulting in worsening of colonic inertia (cleared obstruction though)
March 2009: Loop Ileostomy
23 Sept 2010: Ileostomy reversal