Cancer #5 was just diagnosed. Holding out hope!

Just found this website and discussion boards.   Do I g my best to stay positive.   Had basal cell at 28 and over 100 since then, all on my face.   Had melanoma on my face at 33.  Had to force my doctor to take a biopsy since it was a perfectly round, beige mole but it had bled from all the pores one day.    Breast cancer was discovered accidentally at 52 when going to my primary for something else.   Blessed that it was stage one.  Went thru taxol, radiation and five years of tamoxifen.   Last fall, I discovered a spot on my mouth palate that was eventually diagnosed as a rare salivary gland cancer.  Ct/MRI scans found it in my neck lymph nodes.   More testing accidentally showed mass in my liver, source unknown.    More testing/biopsies/laparoscopy showed cancers in my abdominal cavity.   No treatment on original cancer yet since they needed to know source for liver and abdomen.   Just had diagnosis of this cancer #5 as rare mesothelioma.   Just met with fourth new oncologist today.   Will start treatment in two weeks (to make sure laparoscopy is completely healed).   My goal is to see my kids fall in love, get married and love, hold and spoil grandchildren.   They're 25 and 23.   I've been pretty good at getting back to my normal, positive self after processing challenging news every time.  After trays appointment and reading some of the discussion boards, it seems like it might take me a bit more time to process this.  I have no symptoms of what they have been finding, so I have looked at that as a blessing since it must be early.   However it seems my mesothelioma isn't curable so it's palliative care.   Treatment will be carbo platinum and alimta.   Anyone use these with success?