For over six months I have been experiencing the sweellinf of my feet, calfs and the area behind my knees. It only occurs after I get out of the bed or when I sit down. When I sit down on break for my 30 min. break It hurts to get back on my feet. The back of my knee area feels like it is trying to stay in the postion as i was when I was sitting down. I also have been urinating alot almost every 30min. to an hour. Just a few months ago I was bleeding a little after urinating. Just the other day after I used the bathroom their was some blood, well it was kinda light pink looking after I wiped. I know that the thing with the urinating could be a bladder infection, but could it cause my feet to swell up like this or is it something else wrong?

Optional Information:
Female , Age: 21

Already Tried:
cranberry juice and water