Bloody show ? Mucus plug? FTM HELP PLEASE

J👶🏻💕
I've been having really bad back pain since about 8:30 took a hot shower and it went away for that moment. But as soon as I got out back pain came back. I just went to pee and noticed there was some blood . What is this? I just had an appointment today I was 2cm dilated 39+4 weeks