Tailbone pain

Hello mommies, I'm currently 21 weeks and previously I had tailbone pain in my earlier weeks. Gynae said take paracetamol if too painful. But past few days it's been really bad. It's hard for me to stand on my feets in one position even for a few seconds. I feel a sharp and lightening sensation causing me to change position. Has anyone experienced this before? Should I go for a prenatal massage?