you may not be getting enough healthy fats in your diet. Olive-Oil and flaxseed oil help "grease the wheels" as it were and will help all that healthy food make it thru faster. You may want to do an sesame Oil Enema .
Your body type and digestive system may be wrong for so much raw foods; you may want to cut back on that and have soups instead. A nice natural laxative that ayurvedic medicine recommends is milk simmered 10 minutes with whole cinamon, ginger, cloves, then poured into a cup with honey, taken right before bed.
But mostly the feeling I get is that you need to do slat-board exercises, and perhaps Dr. Schulz' #1. I learned a lot from Dr. Bernard Jensen 's book on bowel management, it includes slat board exercises.