Tight knott feeling
Hello, while i have not had the surgery done myself, i did some reading around other forums and websites online. And from everything i have read, what you are feeling is actually very normal and very common. One person even described the same issue 5 weeks post-op.
So it sounds like you should not be alarmed, but if you believe something is wrong, then it is better to get checked out. Always better to be safe than sorry.