Most of your problems are due to
Thyroid which cause numerous effect to the body. Do not worry about
Amh levels as they do not finalize your chances of getting
pregnant. You need to reduce weight since your BMI is very hifh and it is adding up to your problems. Do not worry about the scanty bleed. Start a homeopathic medicine Kalicum Phosphoricum 30 power , 3-4 globules 3 times a day. This will help.
Next Steps
consult a gyenacologist as these conditions can also be controlled with contraceptive pills