Look, I really know nothing about anything, but given what small babies are like, I guess you're still up. I am, and ds is 6 months now. Not to scare you, or anything. Please try to stay calm.
I think "bonding" as an instantaneous thing is unusual. Lots of women I know, including my mother and myself, took several months to learn to love our los, so I think your HV's question was crass and stupid. Having said that, I do think mybe you are suffering from some pnd - and no shame in that - so get yourself along to your gp today and have a chat. Do not do what I did, and outwit their oh-so-cunningly worded little questionnaire , as you need to get any depression picked up now so it can be treated.
Secondly, I don't really believe a baby as young as yours feels 'love' in the sense tht I think you mean it. I believe they are a bundle of instincts, and not a lot else for a while yet. They recognise those people who can satisfy their craving for food, warmth, comfort, and sleep, and turn towards them. You do all those things for her, and how you deliver nourishment makes no difference whatsoever to how much she wants you - and I ay this as a breastfeeder.
So yes, what I'm trying to say in my usual incoherent way is, yes, at this stage, I firmly believe it is normal for babies to take an 'anyone will do' attitude to carers, as long as their needs are being met. That is why you should jolly well leave her with her doting nan occasionally and have a guilt-free night out. You should make the most of it before she gets bigger, starts to 'love' you, and separation anxiety sets in.
I remember in the dark and early days of dd, I used to be so hurt that she would smile and relax for dh, but not for me. Looking back, I recognise now that I was oh so tense, and, being a perceptive small creature, she picked up on that. It made her upset, as I couldn't comfort her well. So do, please, see your gp or hv for a chat.
The question of relactating I shan't even attempt to address, as I'm no expert, but I do think you've got enough on your plate without beating yourself up over bf! You got the colostrum, the 'liquid gold', down her, and more, besides. Good on you.
Going to press 'post' now, only to see twenty people have leapt into the breach while I was typing one-handed....