During my pregnancy with my daughter (who is now 6 months old) I developed pain in my tailbone. I chalked it up to pregnancy and didn t complain much about it (but it hurt to sit on hard surfaces). Shortly after my daughter was born ( c section) the pain began getting worse but would come and go. When the pain started getting bad a rash would appear along the top part of my bum crack/tailbone. It is dark red in the middle and lighter red along the outside and raised. It tingles and itches a bit but mostly hurts! The rash has been coming and going for 6 months. I spoke to my doctor about it but the rash was gone by that point and she couldn t figure out what it could be. Health wise I feel fine, no temp or any flu like symptoms. Hope someone can help me as my doctors office is closed until Tuesday and the rash might be gone by then!
The pain in the tail bone could be due the trauma occurred during labor and delivery of the baby.  I vaginal exam and the X-ray of they are will help to determine that. For now take common pain pills, make sure you are not breastfeeding the baby at present till you see the doctor.