tmi probably, but really need opinions

Courtney
Ok so I would call my OB but his clinic is closed and I don't know how to get ahold of him after hours
I'm only almost 22 weeks but I just sneezed and thought I peed myself like normal... But when I went to change and clean up there was some clearish, stringy, snot like discharge, it wasn't sticky though. It wouldn't even stick to my panties. It didn't have a smell and it wasn't bloody looking. 
I figure it could be just typical pregnancy discharge but since it came out I've started cramping and having some lower belly pain. 
It couldn't be my mucus plug or anything like that this early right? 
Any good ways to stop or ease the cramping and pains? 
My only other option is the ER and I'd like to avoid that if possible...