I'm 21 weeks pregnant and mucus discharge??

Alexis
I'm so nervous I'm going to my doctor today at 3:10 I found out I'm having a girl the 4th and everything was normal... 
Last night I wiped after using the bathroom and there was a goob of stuff that looked like someone blew their nose then I stuck my finger up there with TP wrapped around it and bam some more... I'm so nervous this is my mucus plug. It's like yellowish a little greenish. Did anyone have this too? Is it normal?  I have no cramping or bleeding and my baby is active. I am a hairstylist and on my feet frequently.