Scared (sorry its long)

So, I just took a home test today a few and I'm pregnant. Me and my fiance have been trying for just a couple months now and we are so excited about this, now since I've been tracking i know i cant be more than a few weeks and I've never found out this early before. I have 2 other kids and I found out around 6 weeks and 3 months, anyway I am terrified about what the dr is going to say. What if I got a false positive on the test, or since I technically I haven't missed a period yet, what if it starts. I've never had a miscarriage or anything idk why I'm so scared. plus I've been having minor cramps that seem similar to period cramps and i didnt have this with my other children either. help please.