So very excited... Yet so nervous!

Okay so... I found out that I am pregnant this past Saturday, May 2nd!  I haven't called to makes first appointment because I am still in a bit of shock- we weren't expecting to concieve so quickly!  I'm nervous that once I make the appointment something will happen... Irrational fear and worry I am sure. I will be 5 weeks on Thursday!  I guess I'm looking for someone I help calm my nerves, I'm filled with excitement, but worry at the same time! 
I am in ontario canada and do not have a family doctor, as such I simply have to go to a walk in clinic for confirmation. I plan to call tomorrow! I want confirmation so I can be more excited! But worry about worst case scenarios!