I recently returned from central america after a one month trip. When I returned home, I developed what looked like 2 hard painful spider bites, and one white headish looking bump around and in my groin, and have just been diagnosed vaguely with bacterial cysts. Definately not an STD. I have been prescribed antibiotics for up to 2 weeks! Is this comon? Is this why I have been feeling run down? How serious is this? Help!