You need to use zovirax. I don't know where you ladies all are based but in the UK that's what we use.
I also suggest when you lip sore clears up throw away your toothbrush N use a new one an throw away any chapstick you be been using an wait til it goes away to use a new one that way you won't risk it coming back
I got one early in my pregnancy just all the hormones you can use abrevia it works really well it's a little expensive for how little you get but a little goes a long way
Mine got worse don't know what to do
I'm the same! 6 weeks and a horrible lip sore :( no idea on how to clear it up x