Spouse Diagnosed - 31

Hello everyone,

My husband has recently been diagnosed with colorectal cancer at the age of 31. It's been a huge shock, not just for him, but for myself as well. 3 weeks ago, we took him the ER due to vomiting, severe constipation, and pain in his abdomen. He had been having on and off symptoms of IBS since December 2018. His PCP (who we are no longer seeing) gave him meds and told him it wasn't anything serious. At most when we took him to the ER, I thought appendicitis. It was like our world had collapsed when they said it was probably cancer before performing his surgery. He had surgery the next day to remove the obstruction and ended up with an ileostomy bag. 

The biopsy results came through a few days later it was noted as "Invasive Adenocarcinoma with Signet Ring and Mucinous Features" (Stage 3C with 11 of 21 lymph nodes positive).I can't seem to find anything specific to this and it seems to be different than Signet Ring Cell Carcinoma, which seems to be bad. We're starting 6 months of FOLFOX 2 weeks from now and have asked that scans are performed every 4 cycles. Does anyone have any experience with this type of cancer? We're really just lost right now. Thanks.