there's a pill stuck in my throat!?

So I have strep and I took an antibiotic this morning, and the first time I tried to swallow it wouldn't go down and the second time it went down and I thought it was okay but then I started choking on it and now I'm really scared cause I'm now sure if it's still there or? Like when I breath out/talk I can feel something rattle in my throat. I don't know what to do help :(