Stress & 1st Trimester HELP please!

Sara
Me and my hubby have 3 dogs, that we love dearly, well my oldest is presenting with some food aggression and my youngest and oldest really got into it today(6yrs & 11months)... To the point that I thought one of them would kill each other. I had to get in between them to break it up, but needless to say it really got my cortisol & adrenaline levels up. 
I got in contact with a dog trainer today to try and rectify this situation.. 
But I don't know what the stress of what just happened could do to my pregnancy. I'm about 5w5d and I've already had a MCat 8 weeks. If anyone knows anything about this PLEASE PLEASE PLEASE respond!!!