Hi, I have had the same problem in the past, isn't it annoying!
Anyway I just wanted to say that men can get thrush too and so if your partner is not taking treatment for it to then he will just keep giving it back to you.
Also a really great thing to do is to get some bio yoghurt when you first feel the symptoms and put it on the area, it serves to sooth the itching and the "friendly bacteria" can help to clear it up!
p.s I have psoriasis so maybe there is a link with itchy skin!?