on and off problem with a bladder infection

Ok in august i recently been having this on and off problem with a bladder infection i had times were i would come for a period of time and then the next day i would be ok for a good while and it stayed like the for along time….august 19 i recieved my period and my period lasts about a week and it was the week before i was goin camping with my family for a week wich was on august 25…well the day we left and got there i still was on my period it was jus about done though and i was still ok no problems wats so ever …period was done and for a good five days i had no problems wats so ever…till once again it came back ….smelly urine and irritation….so i jus drank alot of water well as much i can handle ….and well it stay for a good while and went away so i was like ok watever …septemeber rolls along and i had no problems …till me period came …and after it was done after almost a month again i receieved the problem so i took charge and went to the docter and she gave me medication …she told me to come back after it was done to take another urinalysis …so i took the medication but wasnt able to go back for the urinalysis cuz i got my period and it came back again after my period was done …so again i went to the docter recieved another type of medication and went back for a urinalysis and they said they would call if i had still the infection or not…. and nothing yet ….now im starting to have the sypmtoms again and i jus had my period 2 weeks ago …thing is its not the same as before …i still have the smelly urine …but during the ending of my period i had some weird brown discharge and it cleared up but i still have discharge and it alot more then i usually have and its really thick and white….i dont feel a burn wen i pee jus irritarted after wards and the only way to feel comfortable is to rinse my self down there ….i dont have the erge to go pee all the time jus tat wen i do have to go pee i cant hold it in like i use to….and im not sexually active ….i heard it might be yeast infection ….i dont noe wat to do this will be my 3rd time goin to the docter again ….pls help !!!!