My symptoms arnt as bad.......?

Kayla • Chase and i have been together for 7 years now, we are so excited to meet our baby boy this september😍
So I am 3 weeks preggers. And I have had bad back pain, nausea here and there but no vomitting, fatigue, constipation, ect. However, my symptoms don't feel as bad today as the have the past 2 weeks, is this a sign of possible miscarriage? I haven't spotted at all yet. Just paranoid.