I think you might be worrying a bit more then necessary. I have a couple questions first if you wouldn't mind answering in regards to flushing the incision:
1. Is there a smell of infection?
2. Is there debris in the wound?
If the answer to both of these are no, then I would not continue flushing. The wound needs the time to heal. The more you flush, the more cells and healing tissue you flush away making it take longer for the wound to heal.
Since the healing tissue was cut away by the vet, the incision can no longer heal by first intention which is the goal with surgical procedures. The wound now will heal by second intention which is a quite fascinating, but lengthy process. Healing by second intention, simply put, is when a wound is open. The wound then needs to heal from the sides. This will usually leave a larger, more visible scar.
I advise you to read this link carefully and take the time to understand what is going on. I know not all people are science people, so just remember, the cell names are NOT important. What is important is that you understand what happens in each of the types of healing. I will be more then happy to answer any questions you have... but please be sure to read the link first. I honestly think that anyone having surgery done should understand the basics of the 2 types of healing.
Here is the link:
http://education.vetmed.vt.edu/Curricul ... ealing.htm
All in all, stop worrying so much! Healing takes time, even when it is by first intention. This is going to be a long road, but as long as you have no infection/debris or pain it should be ok. Just keep an eye on it and go from there.