Got engaged now prego...

MyFiancé and I got engaged March 8th! We have been together for five years and are best friends and have an awesome relationship. I am careful but can't take BC because it makes me horribly I'll... Well  I'm preg. and some days I am so excited and happy, others I feel embarrassed and stressed like we can't do this. I havnt told my family yet just 1week in. Should I feel embarrassed about this? We are 29 this is ok right? I just feel like I am irresponsible or trashy or something, I shouldn't feel that way!!