Baby #3 and very nervous

I just found out today that I'm pregnant with my third baby. I guess you could say fourth because I miscarried at 8 weeks after baby passed away at 6 weeks in December 2018. Because of that and several chemicals since, I'm super anxious. My period is 4 days late and I'm not having any signs of it coming like usual. Every time I go to the bathroom, I check for spotting. I'm trying so hard to be calm and not worry, just can't help it. I have a confirmation appointment early tomorrow morning. If any of you want to share encouragement, please do. Good vibes, baby dust, prayers, etc are all welcome. I'm struggling more than I realized I would.