I just started taking clindamycin 300mg for a uti. now my urine has a strong odor. could the uti have gotten worse?

Maybe: If the bacteria causing your symptoms was not sensitive to the clindamycin, which a urine culture would be able to tell, then your infection might be getting worse. I would not rely on odor alone as a sign that it is getting worse, though. Rather, persistent or worsened symptoms like burning with urination or having to go frequently should be relayed to your doctor.

Not likely: Worseing of UTI noted by nausea, back pain, fevers (each suggest spread to kidneys). Clinda is not first line treatment for UTI - do you have allergies or specific problem with other antibiotics? Odor is not best way to tell about uti.

Maybe (not) . . .: Don't worry about urine odor. Focus more on your urinary tract infection (UTI) symptoms eg frequent painful urgent urination. If symptoms are better, then don't worry. But if symptoms persist or worsen (fever & back pain), then go see your prescribing doctor as Clindamycin is not 1st antibiotic choice for UTI unless you're allergic to or have reasons not to take more common drugs.