Now you have explained this, the wait seems less unreasonable. Cheryl suggests hospital. If that's not an option you could try protein-enriched milk-shakes and smoothies. Might be best not to try chewing if the tongue is aggravated each time?

Anyway, you two have me cheering you on and hoping for the best from way down here in New Zealand.

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.