Re: group b strep and not pregnant
Group B Strep is said to be found in the vagina and rectum of 25% of all healthy adult women. Some do not even show signs or symptoms. And no, GBS is not a sexually transmitted disease, nor something that you can "catch" from others (as far as I know). I'm not too sure by your response that the GBS is what is causing your symptoms or if it could be something else, like a minor infection.
It helps if you stay hydrated and drink plenty of water everyday to keep your urine diluted and that helps keep the level of bacteria in your urine low. Avoid any sugary beverages or juices since those feed the bacteria. Make sure you don't hold in your urine and urinate as soon as you need to since that won't allow the bacteria to proliferate in your bladder.
All of the questions you asked above are great questions you should be asking your OB/GYN during your appointments. Jot down the questions you want to ask so you can remember. I'm pretty sure antibiotics need to be taken for GBS and since your breastfeeding, maybe you can ask what other alternatives there are for you.
You definitely want to get examined so you can figure out if your dealing with yeast, GBS or something else.