I've been using freestyle lite 2 sensors for about a year now. for some reason this one change was really painful. I switched arms like I always do but the insertion of the needle when it first went in hurt like hell. normally to me at least they don't hurt at all. my arms been crazy sore and feels bruised. my boyfriends under the impression that I may have hit a vein in my arm. is that even possible? anyone else have this issue? debating on if I should remove it and just check my sugars manually for the rest of the week.