In my experience, treating UC with dietary manipulation and/or other natural, non-pharmaceutical approaches can be extremely beneficial, but it is NOT a quick-turn around process. IMHO, there's no way you can know definitively whether or not the SCD will work for you after only six days. It's going to take time for your gut to heal.
The blood you describe does sound like hemorrhoids, but a flex sig would tell for sure.
The other thing with the SCD and other dietary approaches is there is a lot of individual variation for what is helpful and well-tolerated in different folks who all have the same UC (or Crohn's) tag stuck on them. Unfortunately, there's not really anything you can do but experiment and keep a detailed food journal to track your own responses to different foods.
I got discouraged by my lack initial lack of response to the SCD, but I learned over time that the wonderful homemade yogurt that's supposed to be so beneficial and is very helpful for a lot of people just didn't work for me... not with cow's milk and not with goat's milk. I switched to a powdered, non-dairy probiotic to rebuild my helpful gut bacteria. Some folks just can't do dairy, regardless. It may be a lactose or a casein thing.
A lot of folks get tripped up by the nut flour, too. The baked goodies are so tasty and really help when you're craving the cakes and
cookies you used to eat before the diet. However, too much of the nut flour too early on, when you're not totally healed can be problematic. Same thing with eating whole nuts, beans and raw fruits and veggies.
I would suggest you try to establish what for you is a subset of SCD foods that you know to be good for you. In my experience, these include tender white meat of chicken and turkey, scrambled eggs and omlettes (if you don't have an egg allergy), organic, canned, soft-cooked veggies like peas, carrots and green beans, canned or baked fruits with skins removed (apples and pears), very ripe bananas, nut butters, avacado and healthy oils - (Udo's, fish, flax and olive). I'd give that very safe diet a couple of weeks to a month, then start branching out and experimenting with other SCD foods.
Diagnosed with ulcerative colitis spring 1999
Therapeutic dose sulfasalazine, back on a pred taper for first flare in years. Down to 10 mg and feeling much better.
Probiotics, l-glutamine and fish oil caps. George's aloe vera juice and Mucosaheal.