i am a unprotected sex statisic and would like to know what it means {occaisional pain when urinating. if forced [i mean pushing really hard]i have blood ,also yellowish ejaculet and is said to taste bitter.im thinkin this started from a sex partner from 2 years ago and in the beginning there seemed to be a dark blueish substance[like blue thread or lint]dischargeing but not any more.any info would be nice thanks

Could be anything from a bladder infection to gonorrhea. I'd have your doctor do a screening immediately.