Appearing and disappearing symptoms...

I am 5 weeks and 5 days and nausea started yesterday, like all day nausea! But I feel like my breasts are not as sore as they were. Is it normal for my symptoms to disappear like that I'm so worried about miscarriage as I've had 5 previous ones. Just wondering what you ladies have as far as symptoms at 5 weeks 5-6days!