Following this thread with interest. OP I look forward to hearing how you get on with your GP.
I had a cyst on mine, the Dr took it very seriously and wanted to remove the coxyx! Sadly this would have meant the end of soccer for me, so I refused his kind offer, despite dire warnings that I would one day crawl back to him and beg him to do the operation with the pain.
No, in fact it got better over time just fine.
@nicola Can I ask why coccyx removal would mean the end of playing soccer? I badly damaged mine two weeks ago giving birth to my lovely baby and have been in excruciating pain ever since. I was thinking surgery might be my only hope of ever playing soccer again!