PPH - if you want to continue bf, then of course you can... why feel crap about things? You said yourself the midwife said his chin would make it harder for him to latch effectively.
Of course, too, he has to get food of some sort !
You don't say if you have tried any of the suggestions posted here - sometimes, it can be hard to pick up the phone to call a counsellor, but I hope you will consider it - lots of people here have told you how helpful this can be.
Also - did you feel able to feed more often? I know you said you weren't feeding more often than 3 and a half hourly because you felt your breasts weren't full, though hope we explained that feeling full is not needed. Softer breasts have milk too
In fact, for most newborns, three and a half hourly probably isn't enough, and isn't enough to build up and maintain a good milk supply. Most newborns feed rather more often (though not necessarily regularly) than this.
The key to it all is effective positioning and attachment, though - hope your midwife, or a counsellor, can help you with this, if this is what you want.
Hope your baby continues to thrive