Woeful nectarine

I have a small young spindly nectarine that I planted last year. This spring I was very excited to get blossom which turned into baby nectarines. But over the last week all it's leaves have wilted, some bits are looking a bit ragged/nibbled, and there are slight patches of yellowed/ brown, sometimes in the middle of the lead, sometimes on the edge. It isn't all the leaves that are damaged but it generally is wilty and sad, and the nectarines are falling off. I googled about and I can't work out what it is - it doesn't quite look like peach leaf curl unless it is just developing...bacterial spot? A pest? It looks like it's getting closer to death each day but I don't know how to treat it any ideas? (Sorry if the photos are sideways!)