go GP tomorrow and they will give you antibiotics. dont leave it much longer coz the infection could get to your kidneys (happened to me twice but i didnt get any cystisis symptoms which is why it happened)
the medicine works really well and within 24 hours you should see improvement
Try not to worry about the blood as it is nothing major, its only because your urethra and bladder membranes are a bit swollen coz of the bacteria.
And like everyone else has said, drink water and cranberry juice as much as you can, and even after the infection try to keep the fluid intake up because after you have one, you are prone to more
hope that helps a little, and feel better soon, i know exactly how you feel!