What Is The Cause Of Blood Work Showing Bacteria And Ecoli?

Tested positive for mesa in urine and a facial abscess wound culture as well. On bactrim ds for 10 day. Highly concerned bc 6 mos prior I had an acute kidney attack, worst pain of life, was hospitalized with iv med due to pylonephritus and a renal abscess in my kidney. They never stated mrsa as bacteria then, I recall blood work showing bacteria and ecoli as well. It's all very bizarre and I had no history of any such issues until my son was born via section. My bladder doesn't act like it had, it leaks. As for acute attacks I've recognized a pattern now, it's 3rd one..all 6 mos apart. Is mRsa in urine, wounds also m dean it's, in my blood. What kind of Dr doesn't do blood culture knowing history???????