Could The Withdrawal Symptoms Of Pain Medication Are Heart Burn And Weakness?

hi I have been on pain medicine for 8 years and I just came off them about two months ago (my decision) and all the withdrawals are gone but my concern is every time I eat my mouth will fill with saliva and I will have this huge uncontrollable urge to be sick and I don t know why because this happened while I was on my pain medicine too so im thinking it couldn t be withdrawal but I also had a tumor removed from behind my ear and maybe the dr. done something to my perodid artery or something and I have had my tonsils and adenoids taken out cause its somewhat hard for me to swallow and sine the surgery it still is soo and one last important thing I have heartburn/acid reflux almost everyday. Im hoping for some answers cause im miserable and im thinking this could be serious I have had my liver and all checked out and they said no damage was done there and my bowels aren t normal at all either I don t know it its gastrointestinal issues or stomach ulcers or something with my throat because it doesn t always happen when I eat sometimes just swallowing will start the process and I never know when its going to happen im only 32 I would hate to think im having serious health problems please any comments will be helpful thank you!