I can't remember if I got an answer to that question.
「回答もらってましたっけ?」= Did I get an answer to that question? / Did I get a reply to that question I asked? / I can't remember if I got an answer to that question.
ボキャブラリー
answer/reply = 回答
question = 質問
get = もらう
ask = 聞く
can't remember = 覚えていない
「~だっけ」という部分は声のトーンで表現します。それとも、「I can't remember if...?」という風に確認する事が出来ます。