Fatigue

Leslie • Just want to let you ladies know (if you read this) to check out Sam Heughan in outlander... You can thank me later ;)
I'm extremely fatigued all the time. Like, I slept for fifteen hours the other day and would have slept longer if my SO didn't insist I get up. I'm 9w4d and was never this exhausted with my other pregnancies. Very mild nausea, no appetite, no morning sickness or sore breasts. Should I be concerned?