Smelly Urine for months...E.Coli?

I have had smelly urine for months now. Sometimes less and sometimes more intense.

I remember my urine smelling somewhat as far back as a year or more, but about 5 months ago after having anal sex with my partner I had smellier urine, and often a discharge coming out of my penis. It was hard to tell whether it was more like pus or like a bit of semen that had been left behind after ejaculation.

I also got ill and had a high temperature around the time but dismissed it as cold/flu.

Anyway, 5 months on and my urine is still smelly. Some days I get an urge to pee very often, but I dont have a burning sensation. I feel ok generally, maybe a bit tired at times, but theres other reasons like a lot of work to explain it.

I got a bit alarmed though last week because I have lost about 2 or 3 kg of my usual weight, which is usually quite stable at 75 or 76kg. My diet changed recently because I was recently a dad, my partner is busy, and I do more cooking. But I wouldnt have thought my cooking is less fatty than hers. I am not doing more exercise either.

I have often had 'hypochondriac' thoughts like suspecting I had cancer for no good reason, or thinking that I was going to have a heart attack. (A few years ago at a checkup for a new job the doctor said I had a slight heart murmur, but I shouldnt worry if I felt ok. I started worrying at every stitch or slight discomfort on my chest. Then I read that a feeling of impending doom was a symptom of heart attack and it worried me even more.

I never went to a doctor for any of this. In fact I have never had my urine or blood analysed as an adult, and rarely go to a doctor.

Now, I guess what I have is a urinary tract infection, but the weight loss and no actual burning sensation got me worrying whether I have something serious like a tumour in my kidneys or prostate.

What would other symptoms of that be?