He incision looked clean and healthy over the weekend but on the Sunday evening a purple swelling appeared to the upper left of the incision site. It was about the size of a pinkie nail. I gently washed it and it popped, yellow-ish stuff came out and then it bled. As it was a Sunday night and she seemed in high spirits we decided to wait until the Monday to see if she needed a vet. On the Monday morning it seemed to be healing over quickly, but when we got home that evening another one (smaller) was appearing to the upper right of the incision, opposite the first one. We managed to get an appointment that evening. We didn't have our usual vet, who is fluent in English, and had to make to with my husband's German and the vet's limited English (we are living in Germany) so we found it hard to understand what was happening.
The new vet had Yuna held down and attempted to remove what seemed to be an internal stitch through the first wound that had appeared. Yuna wasn't having it so they gave her a jab to put her to sleep for 15 minutes. When we got back into the room they had removed a fairly long piece of blue thread and said it had been irritating the skin. The vet told us to keep the cone on for another two days, not to wash the wounds, and that Yuna should be fine.
So, that was Monday. On Wednesday when we took the cone off and Yuna was able to wash away the stained part of her fur we saw that she had another dark swelling, but this time right in the incision site

I am so so so worried. Today it does look like it is getting bigger. I will post the pictures I was able to take half an hour ago. Does anyone have any experience with this? What are the risks if she gets put under again for the third time in as many weeks? She seems perfectly happy and wants to play, but this wound is just refusing to heal.
On top of this, we are running out of money. We also got her her pet passport recently so in the last month she had cost us close to 500 euros in spay charges, follow up visits and meds and her vaccinations. I don't know if we could afford another surgery. Could we wait it out and remove the stitches as they appear? Although, at 50 euros a visit (as it was the last time they took out a stitch because she wouldn't let them do it while she was awake) this would quickly add up.
I just want her better
