my uretha burns mildly when i urinate,i drink alot of crystal lite,diet mountain dew soda,coffee and beer!!!when i do i notice it burns more if i drink straight water it gets better,3 weeks ago i received 1-2 min oral sex i was scarred and my docter treated me with testing,with doxycycline hyclate 100 mgs twice a day for a week and one day dose of something started with a A he said i had a really low risk and this would take care of anything just to be safe,now for two weeks stress i found myself drinking mostly soda,beer,and coffee very little water and my uretha started to hurt than my bladder felt swollen,i started to drink 1 gallon of pure water a day and the burning went away but i still feel a little fullness in my bladder,also note that i take alot of creatine supplement also,do you think i have anything to be worried about