Hi Bek, I hope things are going ok with you. Try not to worry too much about things (I know, easier said than done).

Stress can bring on a late period, I'm normally very regular, 31 days, but in August my period was 3 days late. I had a lot of stress on around that time (I am studying as well as working full time and and had an essay due in). The more I worried about my late period (I didn't want to be pregnant that month as I had taken anti-malarials a couple of weeks before that) the more delayed it got. All the time I was getting PMS and cramps.
I don't know much about ectopic pregnancy or the symptoms, but I imagine that you would be experiencing more than regular AF type symptoms. If you are worried, you are right to go and get it checked out.
Best of luck to you - you will get a BFP soon
