how long After a speculum and cervix check is it normal to spot and cramp? I'm 37 weeks went into…

how long

After a speculum and cervix check is it normal to spot and cramp? I'm 37 weeks went into l&d last night because I thought I was leaking it was negative and they did the exams. Well I know its normal to spot and cramp but this is the first time it happens to me. It getting pretty painful though. How long is normal for this? Its brown and pink but I have had some pieces of what I believe is my mucus plug.