I dream often and because they are not particularly good ones, I don't feel good when I wake up.
こんにちは。
ご質問ありがとうございます。
"I dream often"=「私はよく夢を見ます」
"and because they are not particularly good ones,"=「そしてそれらはあまり良い夢ではないので」
"I don't feel good when I wake up."=「起きるときにあまり気分が良くありません。」
(「すっきり」の場合は、"I don't feel refreshed"と言えます。)
ご参考に。
I often have bad dreams, so I don't feel very good when I wake up.
I often have strange dreams, so I feel kind of weird when I wake up.
この場合、次のような言い方ができますよ。
ーI often have bad dreams, so I don't feel very good when I wake up.
「よく悪い夢を見るので、起きた時すっきりしない」
to have bad dreams「悪夢を見る」
don't feel very good「あまり気分が良くない」
ーI often have strange dreams, so I feel kind of weird when I wake up.
「よくおかしな夢を見るので、起きた時変な感じがする」
to have strange dreams「奇妙な夢を見る」
to feel kind of weird「ちょっと変な感じがする」
ご参考まで!