could be because of high BP
along with headache. in today's world high BP is common in both young and old people due to lifestyle changes.. you should get your BP checked consecutively for 3 to 4 days and if its high then you surely are hypertensive. its imp to lower down your BP and you should take anti hypertensive. obesity and lifestyle changes are few reason for high BP. As for your UTI please complete your antibiotic course...
get well soon