Working out

I have a question that may not be answerable. Just curious. A bit of history: I’ve had numerous back surgeries, the latest being a total fusion from t12-l1, a cervical disc replacement and resection of c1 nerve, and right/left hip replacements plus generalized arthritis. Okay, question: I’ve worked out all of my life and continue to do so. I try to Swim 3x/week (I hate it - had to replace bike riding after rib fractures from bike crash), lift weights 3x/week alternating pool vs land, walk 1.5 miles days I don’t swim, do exercises for my back/hips 3x week and stretch. So, I’m quite painful the days after swimming and wonder - is that normal and I should just continue? Or, should I back off? Pain is present no matter what. Just worse after any kind of more strenuous workouts (bike or swim). It feels like my whole body is ‘vibrating’ with pain on my off days and it’s difficult to do anything! Thoughts? Thank you!