Syptoms of UTI and serious constipation.

Hi doctor , i am a 16 year old virgin male who masturbates once everyday. my habbits have been bad for the past 2 months, habbits such as not wearing underwear everyday, wearing it a few times a month and sleeping at 2-3 am everyday. A few weeks ago i started having a UTI. This occured for about 2 weeks and as i was healing from it, i started getting constipated and removed hard small thin stools once every 2-3 days. By that time, i had no UTI symptoms, just the constipation occured. After 2 weeks of being constipated, i drank a huge dosage of coffee and removed everything. A few days later my body went back into constipation and removed the same stools as before with a lot of lower abdominal pain, only this time, i started developing UTI symptoms such as not being able to completely empty my bladder, having a weak urine stream and having to be patient or pushing my urine out of my system or not being able to start my urine stream properly or easily. also some left testicle pain.