Consider seeing your doctor for a urine culture immediately. If you have blood visible in the urine, a fever, or back pain with the infection, you must see the doctor immediately. In addition, here are natural treatments you can do for bladder infections (if the symptoms are not resolving by 24 hours into treatment, see your practitioner):
Drink plenty of water to wash out the infection.
Take the supplement D-Mannose. If prone to bladder problems, this is a good supplement to keep in your medicine cabinet. It is a healthy sugar which is excreted in the urine. It coats the "Velcro-like sticky fingers" of the E. coli bacteria so that they can't stick to the bladder. Then the bacteria wash right out when you urinate. The dose is 1 teaspoon each 3 hours while awake till the infection is gone (use 1/2 dose in children 5 years old and younger and it is OK in pregnancy and diabetics). To prevent recurrent bladder infections, take 1/2-1 teaspoon 2x day (especially after sex). Higher dosing can be used if needed and it can safely be used long term. It has no effect on healthy bacteria, and therefore has none of the toxicity of antibiotics.
Add vitamin C 500 mg 2-6x during the day.
If the infection is recurrent, check repeat urine cultures to confirm the symptoms are actually from a bacterial infection. Also, bacteria comes from the anal area, so when you wipe after a bowel movement, wipe in a direction toward your back and away from the bladder. Otherwise, you're offering the bacteria a free ride to your bladder.