I got my IUD January 2nd and the following day after that I received my period. On January 20 (I had unprotected sex) I started to experience small cramping and just started to get greater until now. Today, January 27, I’m on my third day of EXTREME cramping but hardly any blood in my cervical mucus. My period is supposed to start the 31st. Am I experiencing PMS or is it PID? My follow up appointment is the 30th of January. Anyone experience this?