Azo and Breastfeeding

Is it safe to take? I have a horrid uti and I can't be seen until tomorrow at 9am. It's only 430pm and I'm dying. I'm also breastfeeding. I took pain killer but it's either not working or not kicked in yet. I've never taken an Azo product and of course all the website says Is "talk to your health care provider if you're pregnant or breastfeeding" please I really need help this hit me out of absolutely no where and I'm dying. I have a 2 month old who never sleeps at night and a husband who works nights so she's all me tonight and I can't be in pain all night