Raspberry leave tea and braxton hicks

Jordon
I started drinking raspberry leave tea (50% infusion, not the pure stuff) about a week ago, I'm 32 weeks now. I've been having 2 cups per day and have noticed I've been having a lot of braxton hicks for the last 2 days. I spoke to a midwife at my birthing centre and she said it's fine as long as they aren't painful, is anyone else experiencing this? 
I'm guessing it's a good thing as I must be doing something, but I'm still a little worried.