Honey bunches it's okay to have those days. Totally hear you on the food. TOTALLY SUCKS. Even after rads it took me a bit to get to the point where food wasn't horrid. Some still is... pop is a no go for me even almost two years out... (19 mos post treatment, 22 most post surgery today) It still tastes like chemical soup but I am okay with that totally. I don't do sugar anyway so pop is just one thing I am not missing.
If you wake up hungry make yourself a soothing fruit smoothie. Even add a little ice cream and fresh fruit and toss in some protein powder. I found that chocolate, and strawberry and vanilla were okay flavors for me as I was going through treatment. Chocolate was particularly okay because even without sugar it tasted not bad. At this point you are eating to survive. good luck with the next chemo. and the upcoming rads... and cream cream cream... all over your neck. hugs.

PS for some reason food in it's natural state tasted and still tastes better to me. ;o) prepared and packaged food not so much I could taste the chemicals... ack.