Post-HSG Bleeding

I realize it's normal to have some spotting after the procedure but what I'm having is beyond spotting. 
I had the HSG on Tues AM and had zero spotting until last night (Wed PM) when I starting getting bright red blood and some clotting every time I wiped.  It's gotten heavier and now I need a pad.  Currently I'd classify it as light to moderate flow like a period, only a brighter red.  I googled the shit out of it this morning and it seems that since it's not heavy (yet) and I have no pain, fever, or additional discharge, I'm currently okay. I'm going to monitor it closely though and if it gets heavier or lasts like this beyond tomorrow I'm going to call the dr.  I really hope nothing's wrong!