5.5 weeks and worried

Hi ladies,
I'm currently 5.5 weeks pregnant and feel really concerned about having an ectopic pregnancy. I got my bfp at 4 weeks 1 day - I tested because I was 1 day late and about to have a big night out and had a feeling that I may have been pregnant...luckily I tested! For a week before I got my BFP I had unusual cramping and a pain in my right side near my ovary. Has anyone else felt this?? Since then I've been having some period-like cramping. First u/s on Friday at 6 weeks.