I had my final checkup with Dr Burin today. Today is exactly 4 weeks post-op. I fly back home to the US tomorrow.
I asked Dr Burin about the blood clots again. I still get blood on my pads when I am sleeping at night, but that's about the only time it happens now. Otherwise, during the day, there's no blood at all, except at the very tip of my dilator after I pull it out. He said this is normal and that it may continue for a bit longer, but it will be fine.
Dr Burin explained the surgery to me again like this: He removed the damaged internal skin graft tissue (granulation tissue) by extracting it through my vaginal canal. The surgical team (including a colon specialist surgeon) made the incision in my lower abdomen to access the abdominal cavity. They cut an 8 inch segment of my sigmoid colon and, while the colon segment was still in my body, pulled it down into place in my vaginal cavity. They stitched the deep end closed, and they stitched the other side into my vagina (the 'connection point', which is 1.2 inches inside my vaginal introitus). And of course they reconnected the remainder of my colon to reconnect my digestive tract.
The deep end of my vaginal canal (now comprised of sigmoid colon tissue) is, according to Dr Burin, continuing to heal from the sutures. That is why he emphasized from the very beginning that I should not push dilation depth beyond 4-5 inches for the first 2 months. The deep end is still healing and oozing. That is where a lot of the blood is coming from, both during surgery and even now as it heals. Eventually it will heal completely and the bleeding will stop entirely.
During the exam, he noted that my connection point was wider (thanks to dilations) and the tissue there was also softer. It's coming along quite nicely. Although his recommendation was to dilate twice a day for 15 min each session, I had been doing it for 45 min each session instead. It seemed like such a hassle for me to set up for a dilation, only to do it for 15 min. It is not painful to dilate and actually quite relaxing, so I get set up and watch a TV show in Netflix for 45 min.

Initially the connection point was a bit painful to get past, but nowhere near the amount of pain I felt while dilating in the initial weeks of my first SRS. And now, 4 weeks post-op, dilations are pain-free. It's great.
My lower abdomen muscles are still a source of a little pain though. I don't have any trouble getting in and out of bed like I used to, but coughing and sneezing still hurts. Bowel movements are still highly irregular and at times painful. I can feel the fecal matter as it passes through my lower colon. It feels like a brief stomach ache (but lower in my body) as it passes through, then just as the poo exits my body, the pain goes away. This is all normal for a colon resection surgery of any kind, but still something to keep in mind. Irregular and painful bowel movements are to be expected for the first 2 months post-op, according to Dr Burin and also from what I have read about colon resection surgeries online.