Ok Im Sorry For Such A Long Question But This

Ok im sorry for such a long question but this has become really serious and i cant find any professionals who know what they're doing. So I've had 3 different "doctors" tell me different things and prescribed me different types of med/ antibiotics and I just want someone who actually knows what the fuck they're doing. I went to my primary care physician first whim I told all my flu like symptoms to and he takes a urine sample then tells me there's blood n when I called back for my results im told nothings wrong. Even though he prescribed me a strong anti nausea med which I told him I don't fucking need and some amoxicillin. Like wtf? So I go to my gyno. Her "nurse" as I'm telling her my symptoms just blows me off as its just my period. Then proceeded to argue with me. I'm like no, I know my body and I've had my period since I was 9 years old. She made me feel like a retard and I was about to walk out of there feeling stupid like oh yea probably just my period. But when I go into the examination room and the other lady comes in and i tell her everything, yet again, she examines me and takes a urine test. She comes back and tells me my pee had blood and a decent amount of white blood cells. She then asks me what's bothering me the most. As I told the crappy nurse my breasts have been very abnormal. But I don't want to feel stupid again so I'm like ill just go. But she insists on examining them. She also took a culture and sent it off. So after a painful breast examination she determines that I have a pretty bad breast infection and asks how long I've felt ill. It has been about a month or 2. I had never heard of that and was like what's that huh? She explains and says its weird cuz I don't have any children and I'm not breastfeeding. So she goes ahead and prescribes me a few different antibiotics for the breasts and whatever else is going on which I still don't know. Its been 2 days since the gyno and 2 weeks since my primary care physician visit. The antibiotics don't want to stay down I keep puking and feel like crap. I feel like nobody knows what they're doing or talking about. So I stopped taking the meds cuz I'm done puking my guts out and waiting around for these ppl to figure shit out. How can they get a doctor certification but not know what the fuck they're doing? One of my friends died from a bladder infection for christs sake! Now I'm just waiting for the same thing to happen to me. Is anybody absolutely know for sure what they're doing and actually give a crap about a 19 year old girl or is humanity definitely as horrible and stupid as I've come to believe through my crappy experiences on this earth?! I just need some answers please help.