Emotional

I'm 5 weeks 6 days and I can't stop crying! I'm reading all these things for what I can and cannot eat and then other books are saying the complete opposite.   I hate not being able to go to the OB right away. I don't go until the 27th and that's a "confirmation" visit.  What is a confirmation visit.  Just telling me I need to pee on another stick? Do they do a transvaginal for your first visit ?  It's so early and I'm so nervous since I don't feel pregnant even though that's normal  since it is still so early.    Is anyone on the same boat as me or am I just going crazy and over thinking