I am from Canada and I donate blood every 56 days which is the mandatory wait time between donations.

I went to donate this morning and they tried to deter me away from donating due to my surgery in 48 days.

They dont think my body will regenerate enough of a hemoglobin count and Iron and will cause me to become anemic for surgery.

I was not warned about this from my doctor who knows I donate blood regularity and read nothing about this online.

I still went through my donation process

I have not read any negative things about surgery with an anemic issue.

Should I be concerned?

Any tips to help raise those levels besides greens, and daily Vitamins?

You will be fine. It does take a little while to regenerate red blood cells, but 48 days is more than enough time. Good for you for being a regular blood donor!