should i go get a second opinion? i'm going crazy.

I was just discharged from the hospital after only being there for 15 minuets. I'm passing blobs of blood in my urine, they only did a urine test and sent me home saying it was it showed i had a uti. they didn't check blood or anything my heart rate was 135 and my blood pressure was extremely elevated the pain is so bad when i urinate that while i'm urinating my whole body starts trembling and tears come out of my eyes it hurts so bad. She said she'd send a medicine to my pharmacy and they don't open until tomorrow, i don't know how i'm gonna get through the night i'm going insane this pain is unbearable.