Nervous

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So according to my LMP I should be 7 weeks 4days but baby measured to be 6.1 weeks with HR of 154. I’m trying not to freak out but I’m also hyper aware of my symptoms now and it really feels like my breasts are much less tender then they were last week. Could this be normal or do you think it’s a sign the baby is not growing? I haven’t really had much nausea and had some indigestion off and on as well as fatigue and crazy dreams. Any advice or experiences (good or bad) would be helpful!