I Am A Healthy 48 Year Old Woman. My Mom

I am a healthy 48 year old woman. My mom passed away 3 weeks ago.... I've had loose stools for weeks from lots of stress... today I noticed green, grass colored pea sized lumps in the loose stool. I'm nervous now. I haven't eaten any green items, as a matter of fact I have been eating terribly lately. I did eat the Italian Cake called Panettone that has raisins in it, but I don't think that is what it is. What should I do.... is this cause for concern?