OP, first of all sending love.
Your hormones are at all time high now and it's affecting your mind. Whilst you're not thinking straight, the way you are feeling now is not uncommon, so please don't feel alone in this - you are not.
Being a new first time mum is very overwhelming, even with great support. It's understandable you feel a mixture of worry, guilt, unpreparedness and shock and your mind has gone into overdrive with it all and it's telling you to run away from it all.
The reality is, this is the hard beginning but life will settle into a routine soon enough and I promise you, everything will be OK.
No matter how difficult things are for you emotionally right now, your little one absolutely needs you and nobody else. You are your baby's whole world and there is nobody better for them. There will never be.
What is needed now is for you to gently recover in your own time and in the meantime, keep your baby alive and safe. It feels like a lot now, and yes, it will require effort from you but you can do it and you will do it.
Please pick up the phone tomorrow to ask HV to speed up your referral. You need to see your GP asap and potentially get on antidepressants.
Also give a call to Pandas tomorrow. They're a wonderful charity.
Your baby is still very little and a winter one, it's a recipe for PND ready right there. As soon as the weather improves, go out for a walk with them. Get on vitamins B and D asap. Make sure you eat properly because inevitably sleep is disturbed now and this isn't helping.
You love your baby and your baby loves you unconditionally. Neither of you are to blame for the difficult situation now, please remember that. It will pass - you don't dislike your child, you dislike how hard life has suddenly become but this is a temporary situation and temporary feelings 💐