'The Gentleman' admitted that the injuries impacted his ability to see during the fight and said that his vision was blurred for much of the latter stages.
"I was just trying to process everything afterwards at the hospital," Billam-Smith added.
"I was in a lot of pain, I was cold and hadn’t eaten anything. I couldn’t move from bed to bed on my own and I needed support from others.
"I just remember lying there and shaking because I hadn’t eaten or had any water because of the morphine they were putting me on which did absolutely nothing for the pain.
"That type of fight was so draining mentally and physically, it was really hard to be honest."
Billam-Smith's reign as world champion lasted around a year- and-a-half but despite losing his WBO title, he said that he is not done yet.
The 34-year-old has previously held the British, Commonwealth and European cruiserweight titles.
The current world champions in his division are Ramirez with the WBO and WBA, IBF champion Jai Opetaia and Noel Mikaelian who holds the WBC belt.
Australian Opetaia has a mandatory defence of his title scheduled for January when he takes on undefeated German Huseyin Cinkara.
Billam-Smith is plotting a potential course in 2025 but is also mindful of his life beyond the ring. The 34-year-old trains in London during pre-fight camp, spending significant time away from wife Mia and their young son in Bournemouth.
"It’s likely that if Jai Opetaia comes through his next fight then he’ll fight Zurdo [Ramirez] for three of the belts," Billam-Smith said.
"I’d love to fight the other champion and then take on the winner of that fight if it is possible. It’s got to be at world level either for an eliminator or a world title.
"I don’t want to go on and on though, especially having a young family and spending a lot of time away from them is the hardest thing during camp and missing the little man growing up.
"But I’ve got a couple more years left, I’m not thinking about retiring now I don’t want to off the back of that defeat I want to keep going and I’ll learn from it that’s all I can do."