I had my period about three weeks ago. I had sex and forgot that I had a tampon inside me but it was the last day of my period. I forgot all about the tampon and I started to get a funny smell which I never have infections or problems. Then I was having problems using the bathroom so I think I have a bladder infection. Turns out I had a tampon stuck up inside of me and did forgot all about it. I drank cranberry juice because I think I have an infection and when I tried to go to the bathroom again the tampon came out. Could I have done some damage inside my body already for that tampon being inside me for about three weeks? I have never done that before and I feel silly that I could even do something like that. Right now that its out I feel better but sore. My lower back was hurting too which made me think I had some kind of bladder or kidney infection.