Have you tried the distractionary techniques? Spell out the name ROY G BIV, now search your surroundings for something Red, something Orange, Yellow, Green, Blue, Indigo, and Violet. Get your mind focused on other things, and the 5-4-5-4 technique. Breathe in through your nose for 5 seconds, hold for 4, out through the mouth for 5, hold for 4, repeat.
These can work for me.