Braxton hicks at 17 weeks

Haleigh
I've been having Braxton hicks for probably a week and a half (I'll be 18 weeks on Thursday). I probably have 1-4 a day and sporadically but my main concern is I'm high risk for preterm labor. I've told my doctor and I feel like he thinks I'm getting it mixed up with round ligament pain and all he says is drink water. I drink 64-96oz a day and this is my second baby I know what Braxton hicks feel like. 😑
Has anyone else had BH this early?