I had shellac on for a total of 6 weeks or so, bit had to have it taken off as my nails have gone really weak and brittle. 2 have split really far down, and I can't cut them short enough to cut it out. I loved shellac bit am wary of having it done again if it leaves nails in such a mess, my nails are normally naturally long and quite strong. Anyone else had problems after shellac or is it just me?