idk how to feel

so i really never post my relationship issues on here but I'm not sure how to feel and i feel like I may be feeling a bit ridiculous and overboard about this.

my husband is in the military and had a new girl join where he works recently, they have a 24 hour shift together today and last week while I was there she asked him if she could leave to go see her boyfriend. he even said this morning that she was leaving, my thing is, she doesn't know me, from what I know she recently had her last name changed but still only told my husband she had a boyfriend. so I came to his work because a few of me and his friends wanted to play a card game. so when I get here he tells me his phone is in the office with this girl he doesn't even know. I'm sorry but I'd never leave my phone with someone I don't know, and she also has her dogs up here and I get very uneasy around other peoples dogs especially now that I'm 2 days away from being 20 weeks pregnant and her dogs were all up in my face. maybe I'm being irrational or my hormones are just all over the place, I really don't know how to feel :/