Why is there a purple/blue string coming from my cats tummy?

We had her spayed about a few weeks ago. Went and her stitches taken out. The other night i picked her up to look at her incision to see how it was healing and much to my surprise there was a STRING coming through it... I figure it to be an internal stitch??? But when I checked it today there was a pussy liquid with a small, miniscule amount of blood. I plan on taking her to the vet after a while, but I what I want to know is... Is this normal?????????
LOL those stars are Pus... Guess Spelled that wrong...
My husband is taking her to the vet right now. I usually take her, but I have work and we didn't know how long it would take. I'll post an update for others to know what is going on should they ever have the same thing happen to them.

Sorry for pointing out the OBVIOUS, but yes take her to the vet. My Stimpy told me to say that; I do wish she'd quit reading over my shoulder...

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