well thats actually normal,this happens to me when my period is soon comeing.it happends like a few days or weeks before,then it comes,and the smell im not sure about but im sure its fine jusk ask the doctor he/she will surely figure things out.but its preetty normal.... :)
o and btw its the vagina cleaning its self,the white discharges that come out,but again if your really worried go to the doctor