Tired or napping all day!!

Chelsea
Il be 10 weeks tomorrow and lately I've been so sleepy! The other day I  sleept 12 hr night, got up eat and try to do a small task but got so tired that I took a 4 hr nap mid day! I went to bed again and was able to sleep through the night even after all of that resting. Anyone know if this is normal? Should I just set alarms n try to keep myself awake??