Anyone feeling super down and insecure?

12 weeks pregnant and I feel so unpretty and insecure with my husband. It's sucks so much. I'm just overly sensitive and sad. I don't think he'd cheat on me but I feel ugly since I've been getting bigger and my face has been breaking out and my nails and hair are horrible. I'm not fitting into any of my cute clothes anymore and I lot my style. I know he works with a girl he said he could ealisly date or have sex with if he wanted. I saw her and she's actually pretty. I just feel horrible. At work and crying. Help! Advice or similar feelings??