Hi There Ive Been Experiencing Tightness In My Throat, Almost

Hi there ive been experiencing tightness in my throat, almost like im not getting enough air and my saliva gets thick feeling and makes it harder to breathe. Its a lot harder to explain. night time is usually when it is the worst. i do have anxiety and thats what my doctors keep telling me but for 8 months and having this feeling come and go all day everyday is getting old and hard to cope with. I just got my thyrpid levels checked because i also gained 30 lbs in two months and that is outrageous ive never been this big. The results came back normal and just theres a high amount of vitamin d in my blood. more then normal. i dont take supplements or drink milk. i honestly hate milk....so i dont understand that either.