hi, im 28, i have been married 4 months and with the same girl for a yr and a half. i have alot of problems that i dont know the cause of them, darker urine, sometimes it burns after pee, well not burn but a tingle, my sperm is alittle yellow, on the top of my penis head it is red from the base to the hole, it feels smooth but looks alittle bumpy, i dont have any stds or uti or anything, does anyone have an idea of what this may be? thank you