You're my age ...
Regarding thyroid you'll need to check reverse T3, free T3, free T4 and importantly; antibodies.
Regarding iron and cycling aas/gh; androgens and igf1 lower a hormone called hepcidin which regulates how much iron you absorb from food in your gastrointestinal tract (specifically duodenum and jejunum). If hepcidin is lowered you'll start absorbing too much iron and that wreaks havoc on your whole body. Free iron, ie. non transferin bound iron, which is iron that isn't bound to anything, is a potent free radical and it damages everything from your brain to your liver, heart, etc. It causes mitochondrial dysfunction, cognitive issues, parkinsons, heart issues, thickening of arteries, predisposal to bacterial and fungal infections, etc. A good way of knowing how high levels of free iron you have is measuring transferin saturation, which is what you must measure next along with TIBC, UIBC, TRANSFERIN, FERRITIN and iron. A good measure is also serum Coq10 levels, which are usually lowered in high inflammatory, mitochondrial dysfunction states.
Don't cycle until you get this things checked/fixed.