Do I need to force myself to eat?

Rebecca
I am about to enter my 7th week and just got over a terrible cold and on and off severe diaherra. I have lost 4 pounds :( Now that I am over my cold I have begun getting morning sickness and having no appetite. I am scared that I could end up hurting the baby by not eating. Should I force myself to eat and hope I don't make myself regret it? I would love to hear similar stories of how people coped with their sickness. This is my first time being pregnant