It is hard to take things in. I'm so sorry you are dealing with treatment on a palliative basis. I hope you get a huge rash to prove it's working and that the rash magically goes away once you have a rest from the Erbitux. I'm crossing my fingers for you.

1996, ovarian cancer surgery + cisplatin and taxol.
September, 2007, SCC of left lateral tongue. Excision.
October, 2009 recurrence in scar tissue, T1NOMO. Free flap surgery from left wrist - neck dissection. 63 year old New Zealander. No chemo, no RT.
February, 2014. New primary in left buccal mucosa. Marginal mandibulectomy, neck dissection, right arm free forearm flap. T1N0M0 but third occurrence and some areas of concern: RT started 8 April and finished 19 May.