I have the exact same experience EVERYTIME I have a fill.
As a matter of fact, if they don't get the needle in the port after a few minutes (searching for hole) I have to insist that they stop the procedure!!
I try to combat it by calmly picturing myself somewhere else, singing songs in my head, etc. etc. But like I said,....... if their in there too long it invetiablly happens.......I Cannot control it. It really is quite bothersome.:eek: Crazy as it sounds, it works a little better for me if my Shoes and socks are off!!!:cool2: I know now I sound crazy!!
Let me know if you find out anyway that helps you.