My son is 12. He is active in sports daily. He has days, not every day, but he is tired and actually takes a nap. This has just started over the past 2 months. He usually gets 9-10 hours of sleep a night. Sometimes a little less but never less than8. He is a bit moody...... Also he is going through puberty. Voice changing, peach fuzz is getting darker etc. don't want to panic but should he get blood work done?