I am currently having multiple obstructions that I believe are caused by adhesions. My doctor is unsure and is having me under go some tests. A long time ago, I would get what I thought were kinks in my bowel, this was really soon after my resections. The pain would be very intense and would last for a day or so and then start to fade, like a sore muscle. But these episodes are different. They start out very quickly, last for 12 to 18 hours and then I pretty much feel fine. So we really aren't sure what is going on, but the symptoms are almost dead on for obstruction. I don't think that 3 years post op is too soon to be having adhesion pain. I think you start to develop adhesions during the healing process, so really anytime after surgery you could have pain.
But whatever the cause, you shouldn't be in pain and you should follow up with your doctor to find the cause and hopefully a treatment plan.