Most likely you do. I had a urine infection and it would come and go. The doctor gave me antibiotics but i read about it and its best to just treat it yourself because even after the antibiotics it came back worse. Drink ALOT of water, stay away from sugar, and drink cranberry juice,
Sounds symptomatic of a UTI (Urinary Tract Infection).
Have you been sexually active recently? Have you been to the doctor? Do you have any other symptoms?
Burning while urinating and lower abdominal pain are signs of a UTI, although it could be a lot of other things as well (some STD's have those symptoms also).
Please go and see a doctor and get yourself a blood test.