When my bladder is full pee comes out slow and it sprays is that normal?

A normal consequence. How much urine one can hold widely varies among individuals. Holding urine "too" long leads to a fuller bladder beyond its physiological accommodation, in time, resulting in a floppy bladder with temporary loss of its muscle contractability; hence, see slow urine flow & spraying stream reflecting a slow flow passing through the special configuration of fossa navicularis (the last 1-1.5 cm urethra.