Definitely increase water...will help a lot
I am on my 4th child and have had to go in twice cause of Braxton Hicks contractions, mine were 2 mins apart, no pain, just frequently and uncomfortable, they gave me medicine to stop it. First time happened at 33 week, second time happened at 35 weeks. Basically I have a over actuve uterus is what the doctor's joked but tried to explain. Make sure you are drinking a lot of water and peeing frequently so not to cause any type of infection, it happens and is common in mothers with more then one pregnancy.