Hi For The Past Several Weeks Now I Have Had

Hi for the past several weeks now I have had a slight pain in my head ( was much worse pain in my head in the beginning), ear crackling and popping and stomach issues that have led to diarahea. Before this all started I was just getting over a cold. I have also felt disoriented at times especially in the beginning after I would eat something. It scared me and I ended up going to the ER in which they took blood tests which came back normal and did an ultrasound which they stated that everything was normal. The pain after eating and the disoriented feeling have subsided some but I still have th ear crackling and popping. It almost feels like there is liquid in my ears. I have been diagnosed with seasonal allergies and have been under some stress and do have a little anxiety. I have looked up numerous things as far as what this could be because I am still not 100percent. Things that I have come across are Eustachian tube dysfunction, tmj since my jaw doesn't align properly, bppv, gerd, etc. on top of people telling me it could be stress, anxiety or seasonal allergies. Have you heard of this before and if so what can this be?