Baby loss, rainbow pregnancy and anxiety.

Kelli
Hi everyone,
So a little back story on me. I got pregnant for the first time July 2015. It was the first child for my husband and I. Picture perfect pregnancy and then an abrupt loss at 36 weeks due to a cord accident. My son was born March 15 2016. I spent the past year or so relearning how to live again. 
Found out I was pregnant again in July of that year only to miscarry at 8 weeks. We decided to wait a little and then Jan of this year we got pregnant again. 
Right now I'm almost 25 weeks with my third baby, second son, and I've been doing pretty well with not getting too worked up with worry but suddenly these past 3-4 days my anxiety has been through the roof. On Sunday, after an extremely active weekend, I started getting tiny cramps and had a mild backache which I've had during this pregnancy before. I called in to my doc who told me it's completely normal but my anxiety will not let me grasp that. I don't know what to do to relieve myself other than walking into my OB's office and just telling them how anxious I am. I don't know. Anyone gone through this?