Hi. Thanks for your query. Read your history of stabbing pain at the end of urination, you have frequency. Of urinating. These suggest the following. Severe urinary tract infection. The pain can be due to cystitis- the inflammation of the trigone part of bladder or a stone I the urinary bladder. Your second problem of bleeding and passing clots, mirena coils indicate that you have normal menses after a long time and passage of clots can also be a reason of lower abdominal pain. I would advise you the following: Tests of blood including kidney functions. Tests of urine: routine, microscopy, culture and sensitivity. Ultrasonography of whole abdomen helps for evaluation of urinary tract and uterus. Clinical evaluation and further treatment. I hope this answer help you for proper diagnosis and treatment.