Hi. Do you have a J-pouch (constructed a pouch with the colon that was left)? I had rectal cancer and had an ileostomy with the reversal in June. I now have a j-pouch to take the place of my rectum. The first couple of weeks my stool was mostly liquid and my bottom was very sore.
I think it was about a good 2 months (I'm 4 months out now) until I consistently had formed stools. At first I was on a low residue diet (the less in, the less out) but eventually given permission to add raw fruits and veggies. I was given the warning that with bulk would mean more stool.
I found by eating a high fiber diet, my stools are more normal but have higher volume. I can easily control a more formed stool. I probably go 2-3 times a day but never with urgency or leaking.
I try to only use imodium when I really have to (going every 15-20 minutes more than 5 times). For the most part I am pretty regular now but I do have bouts here and there.
My surgeon said it will take 2 years until you discover what is "normal". You just need to be patient and give your body a chance to get used to its new plumbing. I still get frustrated at times but overall, I am happy with the outcome.
I would talk to your surgeon if it continues to be a problem.