Bleeding after cervix check

I had my 36th weeks appointment today I had my GBS test and she checked my cervix. She said I wasn't dilated. I got home about an hour later and went to the bathroom and noticed red blood, I peed and then after I felt a gush again and was bright red. It's more than spotting but not filling up a pad, has this happened to anyone else? I'm now kinda crampy but in my back, but then again I've had a slipped disc since 10 weeks.  I know they say you can bleed after getting checked but I wasn't sure about bright red, I called the Dr but waiting for a call back and thought I'd ask here too. TIA