I'm having problems crossing myself properly due to a frozen shoulder a few months back. I can only get as far as my right ear on the right side. What if full mobility in that shoulder doesn't return and I'm stuck doing a three quarter cross? It makes me seem lazy and I feel embarassed.
You're not lazy, you're not able at this time. Don't feel embarrassed. Instead, rejoice to make the sign of the Cross as best you can, giving thanks that this cross of yours--your inability--is so intimately connected with the Cross of the Lord.