Labor around the corner?

Addy

Lost some plug this morning, plus cramping and diarrhea, so OB wanted check me again. Since Monday, I've gone from 2.5cm to 4cm and 75% effaced to 90%. I've had a history if shortened cervix and funneling this pregnancy, so he doesn't think I'll make it much longer. I'm currently in the 36th week, excited but nervous about being early.

Anyone else been or are in a similar situation? This is baby #2 for me; never went into labor naturally with my first.