Where to start with multiple health issues?

What are the following symptoms possibly from: itching, dry skin, bug crawling sensation, visual and auditory hallucinations, paranoia, depression (occasional, non suicidal), anxiety (constant), weight gain (80 lbs in a year with no diet change, no weight gain during the following year), lethargy, muscle and joint stiffness, soreness, and weakness (entire body), bone pain both dull and sharp (mostly hips, thighs, knees), headaches, restlessness (mostly oral), insomnia along with sleeping 12-16 hours, brittle thinning hair and nails, polycystic ovaries (more than normal not enough to be PCOS), lower abdominal and back pain, less than 5 periods annually (no abnormal blood results other than slightly elevated cholestoral, plus a negative ANA right after a strong dose of antibiotics)?
Official diagnosis': ptsd, panic disorder (agoraphobic), depression, asthma
No effective medications, which is why I'm curious if there may be something underlying the symptoms.