Green pee

So i was told by my dr i have a uti and that the bacteria was resistant to antibiotics. He prescribed me macrobid and my pee is like a really neon green now not sure if its from the antibiotics or the uti tho? Im on day 3 of my round of antibiotics and today ive had alot of burning and discomfort. Im 22 weeks pregnant and ive had this uti for so long now but cant get rid of it.