You are very recently out of surgery and will need to be patient with the recovery process. As a comparison I have no colon and no rectum and have a frequency of 6-8X in 24 hours. You have some colon and a rectum, I presume, so you frequency will be lower than mine. So, this might be your normal. As long as you don't feel bad; things are fine. What you are describing in the afternoons may well be gas. Gas pains are common in the first couple months post surgery.
Give yourself some time to recovery. Things will change. If you feel stopped up drink grape juice. Stay active, exercise increases motility and will keep your system moving. Walk every day and try not to get anxious about this.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free