Extensive immunology and hematology labs normal, hormones normal not menopause, feel weak/flu-ish aches often. any other bodily systems left to check?

Important 2 diagnose: If you're still having debilitating symptoms - you need to get a 'real' diagnosis. Sometimes weakness and flu-like symptoms result from a chronic infection (like Lyme, Hepatitis C), other illness (environmental allergies--i.e. mold, sleep disorders) or medication effects. If your primary doctor hasn't figured it out - I would ask for a referral to keep looking. There's no sense in suffering.