Braxton Hicks? Contractions?

I'm a first time mom, 25 weeks pregnant today. I have been having cramping since 5pm and it was very spaced out so I assumed it was Braxton Hicks but now the pain has continued and I have timed them and they are every 4 minutes apart and usually only last around 30 seconds to a minute. I've also been having issues going to the bathroom and might possibly have gas. I've also had a lot of mucus discharge but was told that was normal. Are Braxton Hicks usually consistent like that?