My daughter is 21 and started LDN four weeks ago. First few days no side effects. Then the following side effects for days 5-9: gas, bloating, would come home from work exhausted and with subnormal temperature - but after a nap the temp went to normal.
After the 9th day on LDN, the fatigue disappeared and so did the other side effects. She never has D or pain, so the only way we can tell whether she is better is through her labs: she just had bloodwork done the other day, and we are waiting for the results.