I jammed my toothbrush back too far in my throat and felt like I was going to throw up.
I put my toothbrush back too far in my mouth and almost made myself gag.
ーI jammed my toothbrush back too far in my throat and felt like I was going to throw up.
「喉の奥まで歯ブラシを突っ込んじゃって、吐くかと思った。」
jam で「押し込む・突っ込む」
throw up で「吐く」
ーI put my toothbrush back too far in my mouth and made myself gag.
「口の奥まで歯ブラシを入れすぎてオエッとなった。」
gag で「吐き気を催す・オエッとなる」
ご参考まで！
カナダ 
