Recently had surgery done to repair a torn meniscus. After a week I bent my knee and I felt air being sucked in so I straightened my leg out and redish orange, serum like fluid came oozing out. A couple times it was as much as a strawberry coming out, but it has reduced some. However, I am still having air being sucked in and out of my incision. And the fluid goes from light brown to a peachy color. Should I be worried of an infection?