Valtrex and pregnancy

Hey ladies ! So I have hsv 1 from oral sex years ago and I’m 34 weeks pregnant but I’ll be getting an c section at 37 weeks. I haven’t had a break out in over two years and they’ve prescribed for me to take valtrex 3 times a day until the c section. Doesn’t that seem a bit much ? Or is that normal ? And like how much should I space it out by ?