I was prescribed Sulfameth for a UTI only yesterday. I've taken t...

I was prescribed Sulfameth for a UTI only yesterday. I've taken three doses and I feel like complete and utter crap. I feel like I have a huge lump in my throat that goes down to my chest. It's very painful, like someone is standing on top of me. And it gets worse every time I swallow. Even drinking water makes it worse. At first I thought that huge pill just got stuck in my throat but it's been eight hours since I took it and it's still there. Last night I felt the same but I just thought that was from the infection. This morning I woke up feeling great but after taking it with breakfast it's all been downhill. Now my heartbeat is up, I'm getting dizzy and my hands feel really weak and shaky. I just called my doctor and they're switching me to something else. I just hope it makes me feel better than this stuff.