How does delayed puberty affect the long term penis size/growth?

Not much: Most length is acquired from genetics and hormone interaction.

It doesn't: Common causes of delayed puberty do not cause changes in adult penis size.

HDL: Blood work ordered by your physician for "lipid profile".

Bipolar: One or the other. Resistance to treatment is not that common, mostly relating to non-compliance with treatment, at least in my experience.

Zoloft (sertraline): Talk to your doctor about issues like revisiting the diagnosis of depression, zoloft (sertraline) dosage, other tx modalities, etc.

Tapering meds.: Difficult question to respond to online, not knowing what the medication dosage is, or what other meds. U are taking, what has been tried before, and your general health. It is best to sit down with a psychiatrist & review all those issues.

Skipped beat?: Difficult to determine without a thorough physical exam & possibly an ekg. Consult your doctor for workup.

Throbbing arm: Which joint?. Any history of injury?. Any other symptoms in the arm or elsewhere?. Please have your doctor take a look at it.

No interest?: Could be stress overload or situational depression. It would help to talk to your doctor to evaluate & recommend tx or referral if necessary.

Synthroid (thyroxine): Skipping synthroid (thyroxine) can affect your thyroid, sending u in hypothyroid mode, which can affect your metabolism, energy level, moods & eventually heart disease.