Are you doing JUST 3x5, 3x3 and 5x5?
how many days are you working out per week?
Could be adrenal fatigue. Sounds like sleep is fine.
But how's the nutrition aspect? Stress levels in daily life?
If you're just doing strength work, that should NOT be enough to toast you. But if you're doing that + CF + like BJJ or on the side or something you might be overdoing it.....