Sounds like the little one is showing signs of getting ready to enter the world sooner rather than later. I agree with the mucus plug statement . If you are worried, in pain, etc it never hurts to get a medical opinion to set your mind at ease.
Its sounds like ur mucus plug well some of it ...u always lose tis somtimes before .and somtimes at labour ...just ring ur midwive for advice unless ur in pain ..