Had my sweep done today, fully effaced and 2cm dilated, had horrendous back pain since 1pm, getting…

Had my sweep done today, fully effaced and 2cm dilated, had horrendous back pain since 1pm, getting the odd tightening in my bump and had some light brown bleeding, the midwife said my plug went when she did the sweep so not to expect a show, is brown blood normal? And am I building my hopes up thinking it could be starting something with the pain? Very anxious now!