Tail bone pain

Price • Together for over 13 years, married 6 years. After 3yrs ttc w/PCOS we finally have our son! now without trying we r pregnant with baby #2
Has anyone else had tail bone pain? Feels like its bruised or something. Hurts the worst when i have to stand up from sitting. I do have 2 herniated disks in my lower back but this is lower Im 4 weeks 2 days any ideas why?