a 70's song

sung by a guy with a high voice and from the 70's, the only lyrics i can remember are

"i've been feeling bad lately" (possibly 'feeling bad "baby"' not lately?)

Could it be......

Marvin Gaye - Lets Get It On

I've been really tryin' baby
Tryin' to hold back this feeling for so long
And if you feel like I feel, baby
Then, c'mon, oh, c'mon
Let's get it on

Not a really high voice but.....????

true, awsome, thanks man