Hi, I Am A 18 Year Old Female. I Have

Hi, I am a 18 year old female. I have been having some lower pain pain around my kidney/flank area. When I press on that area, both sides feel swollen and they are tender to touch. Occasionally, it burns to urinate; however not every time I pee. A few days ago, I had a pain in my groin/urethra area that was extremely sharp, to where it was hard to sit in on position, and it would go away and come back for about an hour. Haven't felt it since. What would you suggest I do? I've read it could be a bladder or kidney infection. Im just not sure what to do. Thanks!