How To Reduce Pain In Tailbone Region?

I Have Extreme Pain In My Tailbone RegiOn. It Started About 2 WeekS Ago And Would Only Hurt When I Stood Up aAfter Sitting ForLong Periods Of Time. Now It Hurts To Sit, Stand And Even Walk. There Was No Injury, But I Am Overweight And Sit For Up To 5 Hours At A Time On Hard Surfaces. The Pain Is Excruciating And I Have Never Felt THis Pain Before. How Can I Alleviate The pain