I haven't been getting enough sleep lately and I feel pretty rough.
I've been suffering from sleep deprivation these days and I feel horrible.
ーI haven't been getting enough sleep lately and I feel pretty rough.
「ここのところ寝不足で、つらい」
not getting enough sleep で「寝不足」を表現できます。
ーI've been suffering from sleep deprivation these days and I feel horrible.
「ここのところ寝不足で、つらい」
to be suffer from sleep deprivation でも「寝不足」を表現できます。
ご参考まで！
カナダ 
