Symptoms...

Is anyone else's symptoms kinda of going away. I'm 6.5 weeks and it seems I have barely any symptoms. 
I used to have tender breast, nausea, mild headache in the evening. 
And now my breast barely hurt the last few days. Haven't had a headache for days and my nausea is maybe once every two days. 
Is this normal or should I be worried about a miscarriage at this point?