Signs of pending miscarriage?

Heather
We were told Tuesday at our 7 week 5 day appointment there was no heartbeat and she said within the next 2 weeks she would expect the miscarriage to begin. I wish I had asked more questions but I was so overwhelmed and wanted out of the room. I had been having a dull achy pain in my right groin. It comes and goes and sometimes is pretty uncomfortable. Is this or could this be a sign of my miscarriage coming? I still have no had any spotting or bleeding. I'm worried if it is normal or not.