Does this sound like an Infection or Thrush?

[Traveller]

There are a few abx which are ok to take when breastfeeding, I'm sure you GP will sort you out

[BellyBelly]

I dont think infections get uncontrollably itchy though?

Check out the thread on treating thrush with garlic if its confirmed its indeed thrush. I find that remedy works way better than the over the counter products, heaps of others have found that too.