11 weeks

Annelise • 24. Married. I have a 2 year old and 1 year old sons.
Is it normal that my morning sickness just stopped? I woke up yesterday an felt fine which was a first in 5 weeks. For once I wasn't achy an actually had some energy today. I was even able to eat chicken which has made me throw up every time I ate it before. Should I be worried about my baby? We heard the heart beat last weds but is it possible to lose the baby out of no where? I also know that I'm coming to the end of my first trimester so can that be a reason? Just hoping for some realistic feedback