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While a urinalysis can point to signs of an infection in the urine, this is not the definitive test that needs to be done to identify the bacteria. You need a urine culture done to identify the bacteria to see if you're into biotics are correct for the infection. Because you still continue to have malaise, I would recommend that you go back to your doctor to have a formal urine culture done before your trip to determine if your antibiotics are correct. It's very possible that your bacteria may be resistant to your antibiotics and this is why you feel the way you do. Hope this helps.
In this case, it is possible that you may have developed bacteria that are resistant to the antibiotics. Because you still feel symptoms of malaise, I would recommend that you see your doctor for a repeat urine culture to see if you need to be switched to a different antibiotic. Hope this helps.