okay moms that had a back labor. my labor was pretty quick but i went from having regular contractions to contractions…

okay moms that had a back labor. my labor was pretty quick but i went from having regular contractions to contractions in my tailbone after the epidural (which only took the pain away for 15 mins before making it worse) anyway, it hurt to lay down or sit certain ways after delivery which i was told was normal. the last 3 days however the pain has gotten progressively worse and constant. im 3 months pp. also side note, i had one regular period and then nothing im going on 15 days overdue for my next period. (breastfeeding and on the pill) anybody had this? or any advice? TIA