Stringy blood when urinating!!! Help!!!

Hi guys! Last night I had a terrible pain on the left side of my backlit of no where. (like if you were to put your hand on your back to rest it). For two days I cramped like af was coming. I went to pee and this was in it. But the more I peed the worse it got! Lots and lots of strings of blood and also blood in urine. His morning when I woke up, it was all gone. Just little spots of red strings here and there. If this helps, my period is in 5 days. Sorry if TMI, but I need help 😫