lack of food effects the body and mind

hello. i have now been homeless for a month. i chuckle when i tell people- mostly because its too shocking for some,and laughing takes the seriousness out for them.
 i havent felt homeless with friends who boast wonderful beds and REALLY comfy couches [and a blowup mattress].
nevertheless, my body is feeling the effects of constant movement and less food/ less variety of food. after 3 weeks into this gig, went out of town [which felt like the same song, just a different verse], and then came back to one more week...hopefully just one more week.  anyway. my body- i was  so tired after the trip, and hyped up on almost constant coffee, and not enough food, that i was literally shaking that night we came back. i decided that wasnt ok. and then today i got really hungry.
so food was purchased. i bought like i normally would for, say, a 2 week period. not that im staying with J for 2 weeks, but thats how i grocery shop. IT FELT GREAT. and then i ate some of it. AND THAT FELT GREAT
no set place to store food = buying way less; therefore way less at my disposal. [is that a postulate? jk. i know its not. just reminded me of one]
people are sometimes weird about sharing their food. which is ok. and hard for guests.
 not having a set schedule, coming home to a different home...these seem like small things, and somehow it made it exponentially hard for me to eat the way i usually do. i was eating less, and not as many veggies. i ate out more at work too, because it was harder to plan lunch. so i finally said screw it. and i bought things my body is used to, in such quantities that i dont have to worry about eating all of my hostesses' food.
alot of this problem was my fault. i was going at the same pace i normally do- but when you are homeless, you have to slow down, and you have to plan your next meals better, if you can. i noticed my body has been
more tense and tired, and ive felt yucky/ nauseous easily.changing how ive been eating [and i just started today], has helped tremendously.
recent life lessons==dont criticize, dont complain, be kind and defer to the other persons' schedule, communicate about the small things, and be aware of what kinds of food you need [and get them if you can].