Tmi maybe? Plz help..

Katie
Quick question for ya! I'm only 26 weeks - I'm having a lot of cramping pain and I'm not sure what a contraction feels like haha I can't figure out if when I'm feeling crampy if I'm having a BH or not.. I'm also having a weird pressure on my vagina that almost feels like I'm opening up? Please tell me that's normal.. I know this probably sounds stupid haha I'm just not sure what a contraction feels like so it's hard to count them...