36 weeks & 3 days

Alexandra
FTM - I think I've lost my mucus plug yesterday morning & some more this morning. It's was more brownish-green colored. I had mild period like cramps yesterday for most the day, but nothing serious. 
This morning ever since I've gotten out of bed I have horrible groin pain in both the left & right. Should I be calling my doctor to let him know what going on?  I'm a little worried.