Check with a Gi specialist..I've been having this problem coninually getting worse for years..it started with rice then just recently i got pregnant and couldnt swallow at all it felt like someone forcing a ball down my throat and spitting the mucus out was my only releif ..i was then hospitalized when i couldnt eat or drink anything because it got so bad .with several trips to the er and my ob finally they admitted my to the hospital a week after not eating & drinking..turns out after an upper endoscopy i have a esophagal ulcer..its being treated now with 24 hr prilosec & pepcid..lets say I feel much better and no more mucas..I was even able to eat rice again after 3 years.. Good Luck !! I hope you find some relief!!