Ectopic pregnancy symptoms please?

Has anyone ever had an ectopic pregnancy? What were your symptoms? I'm having occassional dull pain on the right pelvic side, missed period, And breast tenderness. Tested on HPT 4 days back and got a negative. The breast tenderness started 3 days back. AF is 10 days late. I'm fearing it might be ectopic pregnancy. This is my first attempt to conceive. A little help would be great.