Hey CaMama,
Hang in there girl....you're doing the right thing & an opportunity for fun and leaving everything behind will come again...and @ a safe time at that.
YES!!! I am 96 lbs thank you very much. A certified HEAVY WEIGHT now. 
Umh...not to poke fun @ 3rd world country children, but ya know those Sally Struthers "feed the children" commercials?...it looks sorta like that! 2 sticks holding up a big distended belly.
Are you meaning the Crohns? or hemorrhoids that you've a mild case of? From the scope, GI did say I did have some hemorrhoids. I do get like a "spasm" feeling & yep...passing an 8 day old BM HURTS!! 
What can we do about the pain? Well, adding more fiber & a stool softener will make the BM easier to pass and less painful. The softer the stool, the less strain & pushing you have to exert. I use a heat pad to the abdomen for cramps and discomfort and gas/bloating. Unfortunatley GI and proctology is not my forte! 
But I am learning as I go along! LOL.
But I know what ya mean by sitting up. It hurts..especially on long car rides.
take good care. {{{{{{{{{{{{ hugs }}}}}}}}}}}}}}
erin