Slippage in L1 and L2

I have had 4 previous back surgeries invomving L3 L4 L5 S1
I have rods, cages screws implanted; now I am again having severe back pain.
The x rays show silppage in L1 and L2.
I am most reluctant to have more surgery.
What would the adverse effects be if I choose NOT to have more surgery, and deal with the pain with injections and pain meds?
Will this slippage continue to get worse?
What are most choices?