Ishutanu, you should not gone to the Doctor immediately, if you know you have a low fever only, you should have taken the common paracetamol first, in two days, there seem no effect, because usually, medicine took effect only after two to three days, so we have to learn how to feel ourselves, don't panic or else it will make you feel worst just as you have said, coz aside from the reaction of the doctor, the test is not necessary unless, he really tested or cheched your fever and asked you how long had that been. And should even asks what have you been feeling so he will know the symptoms, then if he heaard of the symtoms there he will have the suspect of having a real trouble to you that needs confirmation from the blood test. But by just taking the blood test and X-tray without testing you first, that is a hold-up with consent. He just want to charge you with unnecessary things you don't really need it as you said it is just a mild fever. Poor ! You were victimized by your innocense and your fear. You doubled your fever from two things,

1.The charges

2.The sense that you had a serious ailment because of x-ray and blood test.

It's good, he didn't tell you to stay there for observation, the more you get fear and might cause you heart attack, this is a serious matter. For mild fever, always feel yourself first, take paracetamol, if for colds and coughs, look at your throat, if it is pain hard to swallow, and hard to talk, then followed by a fever, take antibiotics for not lessthan one week, but anyway you can feel it if ti is effective in one day, then continue and then you will be fine, but if in at least five days you don't feel any diference yet, then go to the doctor, and don't forget to mention what medicine you have taken.  

"There's nothing we can do to change the past, if it teaches  you a lesson profit from it then, forget it."