At this stage you are only just due for your period the
pregnancy hormones are not very strong
and you can get a
false negative or give a very faint
positive. But, it for sure sounds like you are preggo becaus a positive is a positive.
As far as the pain goes, it doesn't necessarily mean it's an ectopic pregnancy. When I first found out I was preggo with my son (4 months old now) I had the same scare. Pinching, stabbing pains on my side.