Lost mucus plug??

39 week 5 days. Due date this Sunday. I was having mild cramps all day on and off and this afternoon i felt wet and when i checked it was something brownish sticky discharge..i think its mucus plug? After that I've been having little more stronger cramps n heavy pressure feeling in my pelvic.

Is eveything going normal? When can i expect actual labour contractions? Should i be ready to go to hospital by tomorrow? Lol...im ftm so i dono how contraction will feel like. .i hope its not so painful.

Any advice?