Just found out I was pregnant!

Desiree • Expecting # 4 July 5, 2015. But will have a c section a week before I have 3 boys already and this will be my first girl
When is the right time to tell family and friends that I'm pregnant? And when should I start looking for an obgyn? I just took a test today and got my BFP if I calculated right baby is due July 5, 2015 ????