Neutering/Spaying I lost my JuJu after spay no one knows why

My year old sow JuJu had Ovarian cyst's. I noticed the symptoms right away and took her to my cavy savvy vet. We had to get her spayed no surprise there. She was in excellant health and was spayed on the 5th. The procedure went great!! No issues or problems. Her ovaries were definatly over-sized and all that but nothing was infected. It was a typical case of ovarian cysts. We brought her home that afternoon she was sore and groggy but OK. She started looking a little rough many hours later but it was almost time for her pain medication. She was most likely in pain I have that to her and she perked up. She started eating even..then I went to bed. I checked on her in the morning she looked tired and not happy but I figured all of her meds from the surgery had worn off. I held her gently for a little bit and tried to get her to eat. She was OK but out of it, I had never had a guinea spayed before so it seemed normal. I cleaned up her incision a little it had poop on it and some hay. I just used a warm washcloth it wasn't that bad just a little bit. She squeaked at me a couple times. Then I put her back but she didn't seem to move to much which I thought was a little odd. I figured she was sore she was still alert just didn't wanna move much. I Kept checking on her a couple hours later I rushed her to the vet. She had become out of it not very alert she was breathing rough too. It was like she was no longer there when I looked into her eyes. The vets took her in right away abd dud everything they could. There wasn't any bleeding or fluid where her uterys had been everything about the surgery still looked great. They gave her meds and fluid, calcium. Etc. Took blood tests but we still lost her a couple hours later. My vet was so upset when she told us she saud there was nothing she could have dine different during the surgery. There was no complications nothing. My heart is broken and I keep blaming myself for not noticing right away and stuff. Has this happened to anybody else or does anyone have any ideas about what happened. Now my other older Guinea has lumps under his armpit. I knew he had a little one and I was keeping an eye on it. Then JuJu had gotten sick not to long after I discovered his lump. I kinda forgot about it then I checked him last night. It had gotten bigger and little ones had formed next to it. So he sees the vet Thursday which will be a week after JuJu died. I think he has Lymphnode cysts, infection something like that. So I'm heartbroken over JuJu and terrified about my other piggy being suck. Plus JuJu's cagemate is so sad and I'm not anywheres ready to get a new cagemate for her She seems to be having a hard time dealing with the lose of juju... My piddy Kiwi that has the lumps is not related to Juju..

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