Psycosis??

So my baby is 11 weeks old and she cries ALL THE TIME just inconsolable crying. Today, she wouldn't stop crying for 2 1/2 hours. Usually, I can calm her by walking while swaying and bouncing her, but even today that wasn't working. I just wanted her to stop crying! I was loosing my mind, becoming mentally and physically exhausted and fatigued. Now I would like to think I would never hurt my baby I love her! But sometimes I just want her to stop crying no matter how it happens. It scares the shit out of me when I have these thoughts. I can't even talk to my husband about them. I feel so guilty and ashamed. When she stops crying I tell her I'm so sorry and I love her and I would never let anything bad happen to her. But has anyone else dealt with this? If you have specific thoughts on harming your baby but feel sick for thinking it and hold her and kiss her and tell her you are sorry what does that mean? I'm laying in bed sick to my stomach wanting to go sleep in the nursery to be with her.