how many Braxton hicks contractions should you be having at 26 weeks?

I feel like I've been having a lot, they aren't painful I just feel my belly getting tight or hard sometimes I don't notice it until I touch my stomach. Anyways I'm not sure if my stomach is hard from being bloated or if it's contractions. Anyways I'm slightly concerned but I'm probably just being overly paranoid. What is the normal amount  of Braxton hicks that you should be feeling at 26 weeks?