I had a doctor appointment and ultrasound today , while I was waiting I started having real bad…

I had a doctor appointment and ultrasound today , while I was waiting I started having real bad contractions all while they did the ultrasound I couldn't even enjoy it because I was in so much pain. They were hurting so bad I felt like I had to throw up. And when she finished the ultrasound they kept coming and I went into the bathroom and actually did throw up then they stopped about 10-15 minutes after that. So she checked me and I'm only 1cm dilated, that's so odd to me smh