Bad thoughts postpartum

Rebecca • Due May 19 with baby #2!
I have thoughts of hurting/killing my baby. I never would but I can't seem to stop thinking about things here and there randomly like how I could drop her and it would be over or pull her ventilation tube out or her umbilical lines that feed into arteries or push in on her soft spots. Wth is wrong with me?! I am crazy about this little girl I never leave her side and I love her so much it borders on obsession. So why I am I having these thoughts is it postpartum depression or something more? My baby is in the nicu and it makes it all the harder to handle but I never would hurt her. I feel like such a bad mom what do I do?