I've been noticing over the past few weeks that my urine is cloudy. I've had a water infection like 4 years ago or so but at that time I was having blood in my urine. This time, there is no blood but it does burn sometimes when I urinate. I also have, sometimes, pains in my lower left of my stomach, like almost near my waist. I have pains in my lower back sometimes as well, but I think that is because I sit a lot, and lie in bed for a long period. Should I go and get this checked out and what is wrong?

Sounds as though you have a urinary tract infection. Please make an appointment with your doctor for a urinalysis and proper treatment.

Sounds like you need to go and get it checked. You probably have an infection of some sort.
There are a number of things from bladder infection to kidney problems so I would have no idea.

I went to the doctor today, and the urine test came back negative, so there's nothing wrong he said. But, it wasn't cloudy when I went there, so he gave me another bottle to urinate in again the next time it's cloudy, cause he said that the test may be negative right now, but it may just be at that time, so I have to pee again the next time it's cloudy and bring it to get tested again. All he told me was the drink water and cranberry juice.