T6 a I and just had hernia surgery, now I can't void my bladder like I did before

I am a t6 incomplete para and have used external catheters for about 30 years. I just had hernia surgery last Friday and I have not been able to void my bladder without using an intermittent catheter since the surgery. Is there anything I can do to get my bladder working for me again.

Thanks.

T6 a I and just had hernia surgery, now I can't void my bladder like I did before