Excited and Scared!! Need success stories!

Ladies, I just found out we are expecting!!! Would be just be 4 weeks. I am ecstatic and plan on telling my husband on Sunday (Fathers Day!) however I have this nagging feeling/voice in my head that I will miscarry. Can everyone share there success stories to life my spirits?!? I know being plus size and pregnant runs it's risks, but I need the successes for now! lol thank you!!