Mama so sick

Hello to averyone, I am new in this board and I'd like to wish you all courage, faith and strength to your battles!

My mama was diagnosed in end of August with stage IV colon cancer with multiple mets in liver both lobes and lymphs around liver.

After the shock, after crying a lot and starting taking pills to relax, I decided to fight against this.
Then I started going to various doctors (despite the docs my parents were visiting), and also one good surgeon for liver who was working for 10 years in Mayo Clinic.

All docs opinion is inoperable and start chemo immediately, without giving hope.
Of course, in the beginning I did not have hope, but since I decided to fight it I am trying to have faith and think positive.

She started first chemo, oxaliplatyn, dextrosse, leucovorin and 5-FU (I think it is Folfox 4???) but received only half as in the middle had a lot of fever.

Now she has done another three complete with the Vectibix added (wild-type K-ras).

First treatments always fever, docs said was from the cancer (probably from the liver).
Another problem dissappointing us a lot.
Now, thank's God, no fever, but many side effects.

Although seems that now the tumor in the colon has been decreasing so she can now go to the toilet and avoiding for the time being an ileum, she goes abt 10 times after treatment, without having diarrhea.
So, I imagine, does any substance from what she eats stays in her body??
Of course, has no appetite and the great problem for me is that I cannot change her diet as I would like to, like vegens, fruits, juice with vitamin C, milk thistle, nuts etc. because doc said that since there is the tumor in the colon we have to be very careful to her diet.

As I am not from the US, I do not trust docs here, because when they see a patient with cancer stage IV, they tells you always the bad thing....
But I can no longer listen to the doc saying how much difficult the situation is and whatever I propose to him is always negative.

I proposed RFA, chemo directly to the liver (which cannot be done as we have also the tumor in the colon) and he is telling me that we must complete 2 rounds chemo first and then see if we can do anything else.

Although I know, that I should have patience with this damn sickness, I am afraid if we are losing time only with the chemos.
I have also talked to German doc for hyperthermias and I am abt to convince my mama going, but everyone here says we must complete 1-2 rounds of this chemo first.

How do you seem all this treatment, is there any possibility only with this chemo have some good results?
I know that this chemo is the most aggressive for colon cancer isn't it?

The matter is now, that after 3.5 treatments mama is not feeling well, her hematological results are not good, feels fatigue, nausea, right now stomach pain, and the worst for her is the itch in her feminine area and in the mouth.

How can I help her with these side effects, having in mind that cannot eat various food because of the colon tumor and also cannot take various pills because of both the colon and the liver (for example, she cannot take immodium because of the colon, doc said).

I am so sorry for this long e-mail, but I have so many things to ask and no one can understand me here.

Also, my mama decided to fight also, after asking the doc "how much time do I have, if not doing chemos?".

But now she is very dissappointed and I do not know what to do for her.
BTW, my mama is 51 years old and I am 31.

I cannot handle watching her like this, I feel I have to protect her like she is my child, as she would do.

Was any other patient to this situation, having no surgery in the beginning and having good results only wiuth chemos?

Thank you in advance for yr replies, hoping all the best for all patients!!