Extreme tailbone pain -SPD?

I am 18+4 and started getting a terrible pain in my tailbone about a week ago which only lasted for a day and then disappeared. It came back a few days ago but worse and since then I have had trouble walking, sitting and basically doing anything that puts pressure on it. I went to my doctor and she explained the bones are softening and hormones are usually to blame for this and if it doesn’t pass I’ve to return for physio and a possible girdle. Has anyone else had this? I’ve read about spd but it’s always referring to pain in pelvis and thighs etc but this is specifically my tailbone and also the ligaments in my lower bump 😩 I’ve now had to take more time off work which is making me stress out and then I’m worried the affect the stress can have on the baby. Anyone else experienced this?