Preterm Labour?

I'm 30+5 weeks today and have been having a crazy amount of braxton hicks, up to 10 an hour. They don't hurt but they're definitely noticable; my lower abdomen kind of tingles and then tightens and moves upwards until my whole belly is contracted. I haven't had any other signs of labour but it still makes me nervous. This is the second time in the last week this has happened. Last time it lasted a full 24 hours before stopping. My doctor has told me the signs I need to watch for that indicate i should go to the hospital and has warned me to take it easy. I'm just wondering if anyone else us having this many BH at 30ish weeks.