I have the same as you. Diagnosed in April, but I knew a year ago that something was causing fatigue, nausea at time, night sweats but not all the time, rapid weight loss then I would gain it back. I had a persistent dry cough from the lymph nodes involved around my esophagus and diaphragm push in that they caused a tickle that made be cough. We thought it was allergies, or acid reflux, then we suspected a hiatal hernia, something was pressing on my diaphragm. I recall these symptoms for at least three years or longer. With the follicular, indolent, b-cell lymphoma it is so slow growing it is hard to tell how long I lived with it.
How are you feeling now? What was your treatment? What maintenance drug are you on?