Hello madam, thank you for your query.So i went through your question in depth and if you were my patient I will assure you,that you are perfectly alright.During pregnancy a large number of changes do occur.Most of them are reversible but a few may remain.Your bloodworks and scans are normal except for an enlarged thymus.You defenitely donot have Myasthenia Gravis or any assiciated autoimmune disorders.You havent said about any other ophthalmological symptoms.If you donot have vision problems,eye dryness,congestion, i suggest you need not worry.If you are only worried about the cosmetilogical part i suggest you see an ophthalmologist.Also you need to have your thymus monitored if you get symptoms like shortness of breath, persistent cough, swelling of the face, engorged veins on your face, weight loss, decresed appetite etc. Be happy you are alright,see an ophthalmologist if the eye size is bothering you. Thank you