Anyone else?

I'm a FTM and have a 6 week old. I look at her n she's adorable and too too cute & I love her n feel loving but at times I'm soooo irritated N tired esp with the sleeplessness that comes with having a lil one n the crying n the constant demand on u as a mom managing all this and OH BREASTFEEDING! (Exclusively) !! Is it normal to not feel mushy love all the time n be irritable?