Right OP some advice as I know exactly how you feel.
If formula makes everything easier do it, when I switched to formula my DS was so much happier, slept better and I got a break whilst my husband could feed.
Are you worried about cot death? You can get a mat you put under the mattress that will sound an alarm if they stop moving, we had one and it helped me relax when he was sleeping.
Sleep as much as you can hard but try, have an early night and let your husband do the late feed. Grab a nap when you can.
Don’t worry about cleaning the house or any housework just sleep and eat and get to know your baby. Don’t try to do it all, no one is handing out medals at the end of this, no one is watching you, just get through each day.
It WILL get easier, in one week you will feel a tiny bit more confident, in one month a bit more and in one year you will forget most of what you are feeling now and be thinking ‘bloody hell how are they 1 year old already?’
You CAN do this, post on here lots you will gets lots of support from thousands of mums who have written threads exactly like yours.
I felt the same, and now I’m chilled and it’s all a doddle.