OCD isn't correlated with tics. You can have one without the other, having both isn't related. Shivers aren't a typical tic, you can also have shivers even when not cold 😊. Myself, I have tourettes and OCD and know they are not correlated. As far as grounding for ocd, I find allowing myself to count up to a certain number helps. Like allowing myself to count 10 squares, lines, colors, ext. Helps to focus my mind.