Weak Stream after Prostate laser surgery, Leaking urine all day long

I HAD A PROSTATE OPERATION USING LASER GREEN LIGHT PVP. BLED LIKE A STUCK PIG FOR OVER 12 HOURS. ALSO THEY PUT ON A CATURER FOR THREE DAYS. LEAKING URINE ALL DAY LONG, I HAVE TO USE A DIAPPER. MY STREAM IS VERY WEAK. NO PAIN WHEN I URINATE. WHAT IS CAUSING THE WEAK STREAM?