Ongoing uti

3 weeks ago I took macrobid for a uti (who knows how long I had it, I didn’t really feel it). 3 weeks later it still is here apparently. I’m sure they’ll try a different antibiotic but the last one was so hard to take bc I was so nauseous. What if this just keeps going? I just feel like it’s hard to know it’s there and hard to resolve it apparently. Are the babies at risk?