At Work Today....I Was Lifting Boxes...Then I Had This Feeling

At work today....I was lifting boxes...Then I had this feeling of urination...I went to the bathroom...blood flowed out...Then I felt like a relief in my abdomen....Minutes later I felt I had to urinate again...and there was more blood..

Scary,,,what is happening to me? No prostate cancer or bladder cancer, testicle cancer runs in the family.