Weird popping noise?

Amber • Hi I'm Amber, I'm 30 & am pregnant with my second. I have a six year old boy and my SO has a nine year old daughter. We arent telling the kids until march, fir st appointment is on Feb. 11th. :-)
So I'm about to wake SO up.. but this last Contraction.. lasted a minute and a half and there was like two pops that came from my belly....no fluid what so ever is coming out. Has anyone else had this happen???