Hi, welcome to the forum, it is important to diagnose the cause of fatigue. Moderate fatigue can be present with allergic disorders but there will some concomitant or associated diseases. Chronic fatigue is usually seen in some generalized conditions like anemia, abnormal sleeping posture, viral infection (with or without fever), Depression, electrolyte abnormality etc. Even hypothyroidism should be ruled out as fatigue and body ache is its classical symptoms.
The other serious disease which is associated with fatigue and body ache are HIV infection, lymphoma and other blood dyscriasis, muscular dystrophy and other neurological disorders.
Hence, baseline blood tests should be limited to a complete blood count, erythrocyte sedimentation rate, standard blood chemistries, and thyroid function tests. Meantime, having nutritious food, OTC pain killers, skeletal muscle relaxants against prescription, hot water bath and body massage will help.
Kenalog contains a steroid i.e. Triamcinolone, which will help to reduce the allergic symptoms and can help reduce fatigue. The treatment course should be for short term to avoid long term side effects. Meantime get evaluated for other conditions. I suggest you to consult physician for detailed evaluation and treatment of the cause. Take care and regards.
I use to get severe fatigue from allergies as well. Two supplements helped me a lot, Vit D (2000 IU a day) and 3-4g of fish oil daily.
Allergy shots also didn't seem to help that much until I was on biweekly shots (roughly 13-14 months). Give them some more time. :)