I was in the UK for the summer and went in for an eye infection and I was never billed, it was free because I had a valid visa like you, I was on a student visa and not working, but on a student work visa through BUNAC. Its hard to imagine a government that cares enough about people to provide medical care for them, when I went to the UK I realized how badly everyone in this country is getting ripped off. Basic medical care is the least we can do. I understand that seeing a specialist is a little harder, but the care I received was excellent and even the medicine was free. US is disgusting from a human rights standpoint, we do not care at all about the health and welfare of our citizens, especially the sick and aged, unless someone important can get really wealthy or unless they can create a glut of useless jobs, like trying to see whos ripping off who. UK figures its cheaper just to provide the care without discrimination and its right, and gives the citizens a feeling of dignity and respect. After all, if you treat your citizens like criminals, they will eventually act like it. I don't think you should get a bill at all so I wouldn't worry. It's amazing because their system really does work.
--Doctors are men who prescribe medicines of which they know little, to cure diseases of which they know less in human beings of whom they know nothing.--Voltaire (1694-1778)
Ills--Sjogrens-Lupus-like AI Disease, Hashis, Vitiligo, spinal stenosis/fusion with plate, salivary/lymphectomies, Diabetes, NAFLD, COPD, RLS, neuropathy, trigonitis, hystero, diffuse brain atrophy
Meds--Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, Estradiol patch, Prosed, Klonopin, Soma, Ultram, Vicodin, Restasis, Albuterol,steroid injections, Protopic & Triamcinolone Acetonide ointments