Silly question maybe TMI

Rebecca • Mummy to a 4 year old little princess & a new little bundle of joy on the way I can't wait to tell my family & friends
Hi all I no this is gonna sound a bit stupid but
How will I no if I loose my mucus plug??
This evenin I lost a very big like jelly type discharge but there no was blood included 
Iv looked on google but it's no bloody help lol
Any help would b very helpful xx