2 weeks postpartum , 3rd degree tear

I have a third degree tear which was going fine up until 2 days ago when it gets REALLY uncomfortable and itchy after a bowel movement. The rest of the time it’s fine, no itchiness no discharge, nothing. Is that normal at this time or should I have it checked out?

Also I asked my GP and I was told to apply Canesten cream and see how it goes. I did buy it and while I was reading it said don’t use it while breastfeeding!! So I obviously didn’t!

So frustrated and confused. Anyone been there?