This almost certainly isn't enough food. You need to keep your colon full.
Lunch -Sliced Deli Chicken (3 oz) sandwich on Rye Bread -1.5 servings Pita Chips -1 TBSP Hummus Need more of an SF base. I don't see any really unless you're counting the pita chips.
Afternoon Snack 1 -2 servings Baked Ruffle Chips -Can of Tuna Need more of an SF base and there's no IF here at all.
Afternoon Snack 2 -Cliff Builders Bar -3 oz Honeydew Mellon No SF.
Dinner -4.5 OZ Perdue Chicken Breast -Uncle Ben's Instant Rice Packet -1/2 cup Frozen Spinach Check the ingredients on the rice packet. Many flavored rices have some form of MSG and are often high in fat. Spinach is among the toughest IFs to tolerate and 1/2 cup of cooked spinach is a *lot* of spinach.
Evening Snack -1.5 oz Perdue Chicken Breast -6 oz Honeydew Mellon No SF. None, zip, zilch, nada.
Midnight Snack -1/2 can Pink Salmon -Soy Delicous Ice Cream Sandwich The Soy Ice Cream probably has some SF but odds are you're consuming way too much fat between it and the salmon without enough SF to buffer it.
Supplements -3 TSP Benefiber -2 Acidophillus 3 teaspoons benefiber isn't even in the ballpark for what an IBS-C needs in terms of SFS.
You shouldn't be eating anything without a solid SF base: white rice, white bread, potatoes, sweet potatoes, anything on the SF list. You need to keep your gut full of SF. You need more SFS. You need more IF which you will be better able to tolerate if you get more SF and you need better IF: forget spinach, try a gentler IF veggie. Cook, chop, puree if necessary. Make vegetable soup and eat it with French bread. Make stew with lots of potatoes. Eat fish or chicken with plain white rice or plain pasta and a side of mixed veggies, some SF, some IF, well cooked.
The smoothies you mention in one of your other logs don't have any SF. Make with rice or almond milk, use bananas for SF, peeled peaches for SF with a little IF, and throw in some blueberries or cherries for IF.
-------------------- [Research tells us fourteen out of any ten individuals likes chocolate. - Sandra Boynton]