I Have Been Experiencing Pressure In My Throat, Tightness And

I have been experiencing pressure in my throat, tightness and sometimes difficulty swallowing. I have had an upper GI to rule out silent acid reflux, was told that there is nothing significant or of concern. I have continued to experience the pressure - it is mostly present all the time, but more obvious at times. I'm not getting any answers and have been told there is nothing more than can be done, just try over the counter and see if symptoms subside. They have not. I do not suffer from allergies and have tried to identify if anything I eat or drink exacerbates the symptoms - nothing to note. Very frustrated - any suggestions?