P D G H M P D G = Please Dear God Help Me Please Dear God
(this was my first instinct, and I can see I'm not alone--it's got to be this or something similar)
P H M W M L Y W O = Please Help Me
1. With My Life Your Way Only
2. Wasting My Life You With Out
O F F 6 I M U S S G =
Oh Free Forgiveness Giveth Thou My Unpardonable Secret Sin, God
(assuming that's a G and a T, not a 6 and an I; in any case, I'm thinking one of the S's has to stand for "sin", and maybe the SG is "Saving Grace"...I dunno)
P - Forgive me = Poop! Forgive Me!
I Google-ma-fied the first line, and there is a Morrisey song with a similar theme, but I don't think this is it. Just spitballing here....