I’m so so scared howwould you know if you had an ectopic pregnancy !??!

I had a couple positives but for some reason a few days ago I re took a first response 5 days sooner test and it was lighter and I’m nauseous ! And I have cramps that come and go please say a prayer for me because I do not know what’s going on and I know I’m pregnant I will make an appointment because I’m terrified and how bad is bleeding when you have an ectopic pregnancy ? I spotted for two days but only when wiped.