Cold sores.

I'm almost 33 weeks pregnant. I have a cold sore on the top of my lip.. It spread to my lip, & everything. I've been putting stuff on it, cleaning it, everything 😔😔. It feels like it's getting worse 😭😭, what do I do? I have the herpes virus in my blood because my dad had it & passed it to us kids, we get cold sores much easier. Anything I can do? Maybe ask my OBGYN? I have an appointment today.