Please help ladies

Anonymous • PCOS

So I had a miscarriage April 9-13. Was unprotected from the 13 on. Started NuvaRing may 2nd. So I finally started to spot today or bleed lightly l. Which is dark brown. I’m in extreme pain as far as cramps that don’t go away and extreme lower back pain. Help me why am I in so much pain?? Any ladies had this happen and on NuvaRing?