I am 33 weeks pg with DC2. I bfed DS (now 2.2) which was fine, after a shaky start - so fine in fact that we were still bfing when I got pg. Cue the most awful nursing aversion (me) - from about 6wks it was uncomfortable and my supply seemed to disappear. DS was/ is really upset by this and we continued to try, but even as the discomfort faded (it's not a nice feeling physically but it's not terrible) I've become completely filled with panic/ sometimes anger? - I can't even name what it is, but it's a full bodied, emotional revulsion - to the sensation.
We're now in this mad place where he has a bottle interspersed with tiny (two minutes is literally all I can bear but more often that not, I end it sooner) bits of 'bfing' at night. I can't actually believe it - if I'd FF from the start we wouldn't be having sodding bottles now, at 26mo. But he's obviously in it for something else, and where in the past I'd have fed him back to sleep at night he has a bottle. A dummy will not do, he can't be persuaded to suck his thumb (what kind of fuck up have I made here, that I'm trying to persuade him to suck his thumb or a dummy? I feel so, so shit about this whole thing). He clearly misses and wants bfing, he asks frequently and is often upset by my reluctance or when I want him to stop. He often kisses, pats and cuddles my boobs 
and he and I are operating on the assumption that normal service will resume once the baby arrives (just 7 weeks now).
Now the end of the pg is in sight, I'm starting to really panic that it won't necessarily end my 'nursing aversion'. The thought of bfing my DD is filling me with dread - what if I feel the same, sick, panicked, angry feeling even when the milk is back? I've done my best zen mind tricks of just trying to stay with the feeling, and at least work out what it is, but I'm in such a state when it's happening I can't even bear to hold still and find out what it is. And what if I feel okay with the tiny, gummy baby but am still churning with poor DS, whose grabby hands and toothy gob have become utterly horrifying to me while bfing where I swear I had no problem until I was pregnant, and he has been grabby and toothy for much longer than that! I feel like I'm letting him down horribly, that he's experiencing rejection from me and it might worsen when the baby arrives, and that I might not even be able to feed the baby which seems so fucking crap after feeding him quite happily for so long.
Someone please tell me that the nursing aversion will be a distant memory in a haze of oxytocin or something. Has anyone been through this and resumed a happy feeding relationship?