hi. Im 22 weeks with my second. I also had braxton hicks on my first, as bad as they are believe me you'll know when real labour starts. There will be no doubt in your mind.
I would say its maybe strong braxton hicks, if theres not a proper pattern and theyre not growing in intensity then its probably not labour. I spent at least a couple of weeks before my son was born, every night with loads of contractions thinking that was it...I only ended up exhausted and when labour did start for real it was a lightbulb moment, you really will know when it has started x