UTI = Urinary Tract Infection. Symptoms typically are frequent urination, pain/burning when peeing, cramping, and some others as well. You don't have to have all of these symptoms in order to have this infection, so it would be best to see your doctor so that they can test your urine for this infection and start you on anti-biotics if the test comes back positive for a UTI or other infection. Hope it all goes well.
Sounds like a UTI. You should see your doctor and test for it, and it's best to do this sooner than later. If left untreated it can manifest into a very bad infection that can require hospitalization.
In terms of pregnancy, as long as you used a condom from BEFORE penetration occurred till after it was done the odds of it happening are very slim. Symptoms also wouldn't occur in less than a week, as you would first need to be ovulating and then the egg would have to implant.