Well congrats on the remission! I am sorry that you have another medical problem, but hey atleast the crohn's is under control. In terms of how long remission lasts it is really varies from person to person, and unfortunately there is no set time of remission after surgery or when proper meds are found. However it sounds like you are doing well so I suggest keep on doing whatever you are doing...stay on maintenance meds, and try to continue living a glorious life with little to no symptoms. If your lucky you could never have a significant flare up or need for surgery again. I have known people who have done that! Best of Luck!
Diagnosed: 2003, age 18 (had issues with it since I was 12)
Meds for crohns: Off all meds for 1 month until I heal. Still on 10mg Prednisone, and 20mg Oxycodone every 3 hours, and Oxycontin 5mg every 12 hours. Also on a bunch of other meds for crohn's and my other glorious diseases.
Other medical issues: Hereditary Spherocytosis (hemolytic anemia) iron deficient anemia, polyarthralgia, ovarian cysts, Migraines
Surgeries: Spleen and gallbladder out at age 6, Tonsils and Adenoids out at age 21. Ileocecal (small bowel) resection on December 13th. Appendectomy during small bowel resection