I'm a blonde so I have a good excuse! :-) No, really, my family finds words I'm grasping for all the time. Pre-concussion I was pretty social and animated but now I find trying to focus on conversations is difficult and I often have the "look".
As Bud says, try to ignore it. You have enough stress in your life without adding
on what people think. Try to let it go, it's not worth it.