Weird meditation experience

Im emotonally numb, and yesterday, i meditated for about an hour, and then tried to focus on the numbness in my head (sort of a tension). I felt it getting more intense and i suppose tighter, not really painful as in i didnt mind it happening that much. I did this until it was really tight and spread out, and i felt my whole body shake, i was a little scared about what might happen, but it just kept doing that until i stopped. Maybe my mind trying to protect me from feeling the emotions? i wonder if im going the right direction and with practice maybe ill break a barrier.