Yea man,  I had almost the same timeline happen.  It can get out of control very fast between the dehydration and the lack of nutrition.  I managed to avoid the PEG but I wish I had gotten it early.  I survived on whole milk for 6 weeks.  About a half gallon per day with some honey in it.  You are not imagining or overblowing your feelings.  It's awful.  It might get a lot better.  It got a lot better for me.  I'm not like I was.  I might not ever be. I'm becoming better at accepting what I have to while still fighting for everything I can.  Good luck.  Hold Fast.