knee surgery went crooked?

Hello folks.

So here's the thing: I had knee surgery three days ago because my meniscus was torn and everything went as it should.

But yesterday I moved my knee a little bit again because my doctor said it would be good, so I did that yesterday.

However, I noticed that my knee makes strange noises when I move it. It sounds as if there is loose fluid in my knee. You can imagine the noise being like the sound of a stomach when it's working or when you're squashing mucus. It's a pretty unpleasant, disgusting noise.

that's the first thing that's weird.

The second thing is that when I took the bandage off today, I noticed that I have a few strange red-purple spot-like streaks on my knee ( see picture) and for the life of me I don't know if that's normal, because it wasn't like that with my first operation (exactly the same operation on the same knee) 2 years ago, and maybe someone knows whether that's normal or not normal and I should contact my doctor.

I would be happy for a reasonable answer

Thanks.