Not sure what to do here

[Max's Mom]

My son(14) has had diarrhea now for a few weeks.It even leaks out during the night sometimes.The bloodwork looks good,though. We did an x-ray to see if he was constipated to see if he is leaking around that,but x-ray looked good,no constipation.He goes to the bathroom about 3 times a day(down from 6 times per day),murky water comes out.He has an occasional stomachache.Otherwise he feels fine.No blood.The doctor wants us to do a mesalamine enema at night for 2 weeks.He got really upset when I mentioned that kind of treatment and let me know that he won't be doing that.Because of that,plus that it seems like he is doing a little better(less bms)and no leaking anymore for the most part.For now we are waiting to see if things will get back to normal without the enema.I have not told the doctor that we are holding off on the enema because I'm sure they would not like that.Has anybody else had this problem and does it sound like something that could" run its course"?Any advice would be helpful.