Im very sorry to hear about your symptoms.
Now your symptoms can be indicative of a number of conditions and this would have to be narrowed down. The first thing which comes to mind after hearing about your heavy eye lids is that you could have ptosis which is a condition in which there is weakness of the nerves or rather the muscles of the eyelids. Myasthenia gravis is a condition which can cause ptosis as well as weakness of the muscles of the limbs. classically this would get worse as the day goes on. This would need to be evaluated with the help of a EMG/RNS and certain blood tests.
Now the increase in the size of the eyes can be an indication that you have proptosis which is a condition in which the eyeballis protuded outwards and forwards. This can occur in thyroid disorders like graves disease in which there can be other symptoms like palpitations, sweating, heat intolerance, shortness of breath, weight loss , tremors of the hands etc. this would be diagnosed with a simple thyroid function test.
The forgetfulness can be simple memory issues or a sign of a medical disorder which in combination with the other symptoms can be due to a brain problem.
As you can see there are several possibilities here and these can be narrowed down on a clinical examination, now instead of visiting several doctors i would suggest that you visit an internist, an internist can usually manage most of the medical conditions including thyroid disorders and can atleast make a diagnosis of myasthenia(if you have it) and he can also look into the other possibilities as well. He can rule out mostof the conditions and do the initial blood work which is required here.
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