Hello, Thanks For Taking The Time. For The Last 2

Hello, thanks for taking the time. for the last 2 weeks I have had pressure when I urinate. On Saturday I had moderate lower left back pain. I had sex with my boyfriend with a little discomfort. I was woken up by extreme lower abdominal pain that i have never experienced before. Yesterday, it hurt to cough or laugh today I feel better. Should I be worried? Should I go to the ER?