Hello OP,
I’m glad you’ve reached out here. As my name suggests, I’m a mum and a midwife and I’ve been exactly where you are. It is a very frightening place to be, but there is loads of help available. I won’t try to diagnose you over the internet but I suspect you have some form of postnatal depression, anxiety, and/or OCD. It’s really quite common and can get better. It is good to get help right away though so you can enjoy your baby and that it doesn’t get worse. Sometimes the combination of depression and hormones and new baby stress and sleeplessness can get quite severe very quickly, especially if you have any background of mental health issues like bipolar, depression, psychosis, or a schizophraenia.
You should each out to your midwives, your health visitor, or your GP so they can put supports in place for you and your baby. You can even attend A&E and ask them for help. You can also self refer through CAMHS and be prioritised because you are postnatal. You need help right now, without delay.
Also, do you have any support around? Partner, family, close friends? Let them know how you are feeling so they can help with baby and taking care of you.
please let us know how you’re getting on, I’m worried about you. I went through the same myself and it was so frightening (even though I knew so much about it from my own work!) but I received excellent care quickly on the NHS and was able to enjoy my baby and being a mum. 💐