Am I horrible for swearing at my baby?

I'll start by saying I would never hurt her, that thought does not even run through my mind and that is not what this post is about. She is six weeks old and gorgeous. But when it's 3am and I have finally got her back to sleep after her 1am feed, I lay her down in her bassinet next to my bed for the third time. I lay down and after 30 seconds I hear her awake. I say into my pillow "please go the fuck to sleep". This repeats. Sometimes it's me peering over the edge of her bassinet and popping her dummy back in her mouth and cursing, other times she's half asleep feeding and whips her head away ripping my nipple, and I ask her to cut it the fuck out. I never yell and it's only ever during the night when I am half asleep and at the end of my tether.