Is it a bad sign if symptoms are decreasing?


I'm 7 weeks 3 days pregnant and for the last few days my symptoms have been fluctuating a lot or just not there some days. I used to have consistently very sore breasts, consistent pulling, and extreme hunger. Around the time I hit 7 weeks my hunger turned into the inability to finish a lot of food. I've felt pretty nauseous a couple times but that's it. My boobs were pretty sore again a couple days ago but now they aren't sore at all. I feel a little bit of pressure/pulling occasionally but not like it was before. I have no cramping or bleeding though. I had an ultrasound a few days ago and my doctor said my baby measured slightly small so they put me at 7 weeks instead of 8, but that there was nothing to worry about and baby had a strong heartbeat.

Should I be concerned?