Why does my urine smell strong and weird?

[Sarah]

I sort of not to long ago only...and I mean only drank soda, recently ive been cutting back or when it really bothers me I will only drink flavored water or cranberry juice...truth of the matter is I didnt drink much of either...like when I drank soda I would just drink maybe 50% of the can...maybe have a whole can a day... the juice I sip throughout the day cause I wasn't that thirst... the past few months my urine is just really strong and pungent odor.. I am a little worried... this mainly happens if I hold it in or when I just wake up ... my fiancee made me drink a lot of water (2-3 bottles) and a juice box... and not to hold in when I have to go..I didn't really have to urinate that much till the next day but there was no odor and my urine was practically clear.. it was fine for a few days but went back to smelling bad again.. but then again I wasn't living up to the ritual of drinking a lot of fluids again... I do not drink alcohol... is there anything seriously wrong with me? I know "go to the doctor" will be a main answer here but I am just asking if anyone has had that problem before... is it likely to be life threatening????? and somewhat cloudy..not much but its quite concentrated