Braxton hicks and nausea!

Alyssa
I'm not 29 weeks with my 4th pregnancy. I never had any Braxton hicks contractions with my first two. My 3rd I started to have contractions and went into the hospital like doctor said to receive potassium, over fluids and shots to stop labor. That worked!
I've been having Braxton hicks since I was around 18 weeks on and off. But today they have been worse then all the other times. I get them so bad I feel like I'm going to throw up, poop my pants or pass out. The baby is still pretty active so I'm pretty sure it's not labor but what can I do to relieve these contractions? I'm exhausted and can barely keep up with my other babies.