Too soon

Just got a BFP and I haven't even missed a visit from AF... I'm 4 weeks based on LMP .. I'm estatic! And so is my DH but he is already telling people and I get so nervous! We have a dr apt on the 21 but he's speeding the news at work (we work at the same place.. Kinda) and I just feel it's too early to spread the good news. Am I over reacting!?