So When should I call my OB?

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So at what point should I call my OB? It feels way to early to call my OB and start scheduling appointments. My due EDD would be June 1st. I have history of Miscarriages prior to having daughter. When I was pregnant with her I had 3 ultrasounds before 12 weeks. I guess I just feel like I am waiting for the other shoe to drop.....what are you of you ladies doing? Have you called your Dr yet to start scheduling appointments?