I have had kidney stones for a month, been to the ER 4 times. Have had a fever, vomiting etc. Von whilibrands diseases, patela replacement, full hystrorectomy

Kidney . Kidney stones can be quite painful as you know, if associated with infection they can be lethal due to sepsis. You need to see a urologist asap. He may place a stent to divert urine around the obstructing stone. You may need to be treated with antibiotics and possibly hospitalized.
You . You need to see a urologist asap. You need to have that stone treated.