If you were a male I'd say it was a prostate infection, however in the case of a female I am not sure what exactly would be going on there, I wish I did.
However, I do want to give you the same advice I gave on other posts, which is that if you are or have taken antibiotics for any length of time, you really need to take a probiotic to replace the good colon bacteria that any antibiotic kills off. Without replenishing this bacteria properly, it leads to Candida/yeast problems, constipation, fatigue, foggy brain, and many other potential symptoms.
Take it from me, I had to find this out the very hard way over the years. I now take a capsule called Primal Defense, it is the best probiotic I've tried. It's available in any Vitamin Shoppe catalog/store. Antibiotics are sometimes necessary, but unfortunately no one tells you that in addition to killing the bad bacteria, they also destroy the good ones that your body needs to function properly.