strange throat tightening

I have have this happen to me twice now in the past year. So far, it is the worst pain I have felt in my life. I can't compare it to giving birth just yet; haven't made it that far... The first time it happened I remember I leaned back in my chair at work to stretch and when I came back up and swallowed it felt like something in my throat had tangled or something. Everytime I would swallow it would feel like it would get tighter. It hurt more every swallow. It didn't feel like a lump or anything. It lasted maybe 3 mins. and then it felt like something had moved over or clicked and the pain went away. The second time I was at home and I might have turned my head a certain way, I can't remember, but I freaked my husband out. I sat straight up with my eyes as wide as they could be. I told him we needed to go to the ER. It was seriously that intense. Then like before something just kind of clicked in my throat and the pain went away. I have told a lot of people and no one has ever heard of anything like that. I absolutely never want to have that feeling again. I get scared to swallow sometimes when I stretch or turn my head a certain way. If anyone knows what is going on, please tell me. Thanks!