Hi,
How are you? Migraines are primary headaches that can occur with a variety of triggers. A headache journal or the headache tracker here in the forum may help identify your triggers. Diagnosis of asthma is with complete medical history and further diagnostics including spirometry. To rule this out, have this performed and see your doctor for proper evaluation. Thyroid function tests will also determine if your thyroid is fine as mentioned above. Continue your present medications and you may also discuss anxiety medications with your doctor after your antibiotic therapy. Take care and best regards.
It sounds like you might have more than one problem causing your symptoms.
your anxiety could easly cause the headaches and even the breathing problems your having. I would see an Allergist to fid out what allergies you might have. An allergy could cause your bresthing problems and hives.
Your hypothyroid my not be totally under controlled either and seeing an endocronologist would be able to tell if your synthroid dosage is where it should be for you.
If you do go to an endocronologist make sure they test your FT3 because your TSH may be ok and your FT4 may be ok but if your FT3 may not be and doctors should always be checked because of that reason.
I hope I was some what helpful to you
Feel Better Soon.