I am sorry to read of your upstage, but one thing I have noticed here is that with a higher staging will come with a more aggressive treatment plan and a better post treatment surveillance plan to seek out any reoccurrence.
This may sound scary to you, but it should reassure you that you are dealing with your cancer diagnosis with the best treatments and the most active surveillance program to keep up your future good health. Lower staged patients are sometimes not scanned as much and many do more worrying than knowing that things are on track and going well. Never be afraid of knowledge.
It is better to know, plan, and execute your treatment plan and have planned scans to ensure all is going well in the years to come.
D/H 47 years old, 10/2014, Stage IV M/CRC, nodes 12/15, para-aortic, 5 cm sigmoid resection, positive Virchow. KRAS mut, MSS, Highly Differentiated, Lynch Neg, 5FU/LV and Avastin 1 YR (Oxi for 5 months), Zeloda/Bev since 01/2016. 02/2019 recurrence para-nodes, back to 5FU/LV Oxy/Bev. It is working again. "...Perseverance is not a long race; it is many short races one after the other."-Walter Elliot