Hi Yael,
I've also had vasospasm. It wasn't as bad as yours, but a friend in mums group did have it as bad as you> She used a heat pack b4 and after every feed.
I tried to keep my nipples warm with breastpads and jumpers. But what really cleared it up was taking evening primrose oil twice a day> My lactaction consultant recommended it. I took it for about 3 months and then it all cleared up. That was about 7 months ago now and its just started to come back a little. Not painful, but if it does I'll start up the primrose tablets again, they worked really well. You can get the tablets at the supermarket.
There's a female doctor is Shepparton who is a specialist on vasospasm, unfortunately as mine cleared up I threw out her number. But call the Echuca Regional Hospital and ask for Lesley (the lactation consultant) and she can give you the info and the doctors number.
Hope this helps,
Hayley