Well married is for life, if he cant handle you with this he will not able to handle the marriage.
And he is your soon to be husband, which we expect to be the one who closest to you and your main support. If he trully loves you he wouldnt bat an eye.
I think better let him know before you seal the deal, let him decide.
I'm sorry to hear your story, I really am. All I can suggest for at this point ia try see a doctor and take a medication like Acylvoir.
And I strongly suggest you to try coconut oil, some people call it Virgin Coconut Oil (the green or transparent one) put it on the lessions and take it orally 1 tbs. It helps. Try it.
Message me if you need someone to talk to.